TIDMNG.

RNS Number : 7052G

National Grid PLC

08 November 2018

 
 
   London | 8 November 2018: 
    National Grid, a leading 
     energy transmission and 
       distribution company, 
    today announces its Half 
               Year results. 
 

Report for the period ended

30 September 2018

 
    Highlights                                                      Financial performance 
     *    Maintained strong reliability and safety across all        *    Underlying operating profit down 6% to GBP1.3bn, 
          networks                                                        primarily from expected return of Gas Transmission 
                                                                          allowances and US tax reform, partially offset by 
                                                                          favourable legal settlements of GBP94m 
 
     *    Decided to exercise Cadent 39% options; sale 
          completion in June 2019 providing GBP2bn cash 
          proceeds                                                   *    Underlying EPS of 19.7p, up 1.2p, reflecting a lower 
                                                                          tax rate and reduced share count 
 
 
     *    Reached major milestone in the US with all 
          distribution companies under refreshed rates               *    Statutory EPS (continuing) of 12.7p after exceptional 
                                                                          charges: UK cost efficiency and restructuring 
                                                                          programme GBP127m; Massachusetts Gas workforce 
                                                                          contingency plan GBP97m 
     *    Approved GBP850m investment to proceed with Viking 
          interconnector 
 
                                                                     *    Interim dividend 16.08p/share, up 3.8% in line with 
                                                                          policy 
     *    Launched UK cost efficiency and restructuring 
          programme 
 
                                                                     *    Capital investment GBP2.1bn, up 7% 
-------------------------------------------------------------  ---------------------------------------------------------------- 
 
 
 Financial summary 
  Six months ended 30 September - continuing operations (excluding Cadent) 
                                  Statutory results                 Underlying(1) 
========================   ===============================  ============================ 
 Unaudited                     2018      2017     % change     2018     2017    % change 
                               GBPm      GBPm                  GBPm     GBPm 
========================   ========  ========  -----------  =======  =======  ========== 
 Operating profit             1,017     1,274         (20)    1,285    1,368         (6) 
=========================  ========  ========  -----------  =======  =======  ========== 
 Profit before tax              522       780        (33)       816      846         (4) 
=========================  ========  ========  -----------  =======  =======  ========== 
 Earnings per share           12.7p     17.7p         (28)    19.7p    18.5p           6 
=========================  ========  ========  -----------  =======  =======  ========== 
 
 Capital investment           2,130     2,000            7    2,130    2,000           7 
=========================  ========  ========  -----------  =======  =======  ========== 
 
 

John Pettigrew

Chief Executive

"We have continued to make strong operational progress in the first six months whilst maintaining excellent levels of safety and reliability. Investment in our networks increased to GBP2.1bn, including further progress on our three major interconnector projects. In the UK, we are implementing a cost efficiency and restructuring programme to ensure that we continue to drive outperformance for customers and shareholders. In the US, we have completed a full refresh of our rate plans so that all our distribution businesses are now operating under new rates, a major milestone which will support our continued growth. We continue to seek a fair settlement on union negotiations in Massachusetts.

"Strategically, we have made good progress with the decision to exercise options for the sale of our remaining 39% share in Cadent and the final investment decision on the Viking interconnector. Looking forward, National Grid is well positioned for the ongoing energy transition and we are on track to achieve asset growth at the top end of our 5-7% range in the medium term."

(1) 'Underlying' represents statutory results excluding exceptional items, remeasurements, timing and major storm costs. These and a number of other terms and performance measures used in this document are not defined within accounting standards and may be applied differently by other organisations. We have provided definitions of these terms on page 52 and reconciliations of these measures on pages 52 to 55. The Group does not believe that these measures are a substitute for IFRS measures, however the Group does believe such information is useful in assessing the performance of the business on a comparable basis

 
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 Conference call details 
 An analyst presentation will be held at the London 
  Stock Exchange, 10 Paternoster Square, London EC4M 
  7LS at 09:15 (GMT) today. There will be a live webcast 
  of the results presentation available to view at 
  investors.nationalgrid.com. 
 
  Live telephone coverage of the analyst presentation 
  at 09:15 
=====================================================================================  ================= 
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====================================================  ================================================== 
 US dial in numbers                                    +1 866 966 5335 (US toll free) 
                                                        +1 212 999 6659 (New York) 
====================================================  ================================================== 
 Password                                              National Grid 
====================================================  ===============================  ================= 
 National Grid image library available at www.nationalgrid.com/group/media 
 
  You can view or download copies of the latest Annual 
  Report and Accounts (ARA) and Performance Summary 
  from National Grid's website at investors.nationalgrid.com 
  or request a free printed copy by contacting investor.relations@nationalgrid.com 
 

Inside Information in relation to the decision to exercise Cadent options

This announcement is being disclosed in accordance with the Market Abuse Regulation (EU596/2014) and has been determined to contain inside information in line with the definition therein.

Use of Alternative Performance Measures

Throughout this release we use a number of alternative (or non-IFRS) and regulatory performance measures to provide users with a clearer picture of the regulated performance of the business. This is in line with how management monitor and manage the business day-to-day. Further detail and definitions for all alternative performance measures are provided on page 52.

OVERVIEW

National Grid has continued to deliver strong operational and safety performance, with an employee injury frequency rate of under 0.1 - less than one lost time injury per million hours worked. Capital investment increased by GBP136 million at constant currency to GBP2,130 million for the first six months of the year. This reflects significant investment in developing and maintaining gas and electricity infrastructure that provides critical services for millions of customers in the UK and US.

Underlying operating profit decreased GBP79 million (or 6%) at constant currency versus the prior period to GBP1,285 million. This mainly reflects the expected return of UK Gas Transmission allowances associated with Avonmouth, the impact of US tax reform, and lower profits in the US due to storm costs. This was partly offset by increased revenue from our new US rates, and benefits from legal settlements.

 
 Six months ended 30 September               At actual             At constant 
  Underlying operating profit              exchange rates            currency 
                                     =========================  ================= 
 (GBPm)                                2018    2017   % change    2017   % change 
==================================   ======  ======  =========  ======  ========= 
 UK Electricity Transmission            556     540          3     540          3 
 UK Gas Transmission                     91     144       (37)     144       (37) 
 US Regulated                           431     526       (18)     522       (17) 
 NG Ventures and other activities       207     158         31     158         31 
 Group total underlying operating 
  profit                              1,285   1,368        (6)   1,364        (6) 
===================================  ======  ======  =========  ======  ========= 
 

'Underlying results' and a number of other terms and performance measures are not defined within accounting standards and may be applied differently by other organisations. For clarity, we have provided definitions of these terms and, where relevant, reconciliations on pages 52 to 55.

Headline operating profit decreased by GBP54 million at constant currency versus the prior period to GBP1,202 million. Headline EPS was 17.8p compared to 16.6p in the prior period. For reconciliation between Statutory, Headline and Underlying results please refer to pages 52 to 55.

Decision to exercise Cadent 39% options

We have decided to exercise the options over our remaining 39% share in Cadent and the sale is expected to complete at the end of June 2019, subject to customary regulatory approvals. As previously announced, the expected proceeds of GBP2 billion will be retained by the business to reinvest in the strong organic growth we anticipate in the medium-term. The financial results of Cadent for this and the prior period have therefore been classified within discontinued operations.

US Regulated business makes good progress - all distribution companies now under refreshed rates

We made good regulatory progress in our US Regulated business as we completed the refresh of rates in our distribution businesses. Following the agreement of new rates for Rhode Island Gas and Electric in August and Massachusetts Gas in September, all distribution companies are now operating under updated rates, supporting increased levels of investment and strong returns. Investment drivers in Northeast US are projected to continue to sustain a high level of asset growth for the US business of over 7% p.a. over the medium-term.

The lower US operating profit reflects the impact of US tax reform, and GBP56 million higher costs from a number of storms. The majority of storm costs are recoverable under existing regulatory mechanisms. Due to seasonality, US full year profits are weighted towards the second half. This will be more pronounced than usual this year due to higher storm costs in the first half, and with new rates coming into effect in Rhode Island and Massachusetts Gas in September and October respectively. Overall, the lower tax rate will represent a small benefit to full-year earnings in 2018/19.

Massachusetts Gas update

We continue to negotiate with two of our gas unions in Massachusetts over employment terms and conditions. The two unions represent 1,250 workers from our US workforce of 16,000. Particular issues include the amount of employee contribution to healthcare and proposals to bring future employees into a defined contribution pension scheme, rather than a defined benefit plan. Over the last few years, we have agreed very similar terms with 16 other unions and are hopeful that we can reach an agreement with these two unions.

The negotiations have been ongoing for several months and as no agreement was reached before the existing contracts expired, we had to implement contingency workforce plans from the end of June this year. This includes the employment of fully qualified contractors and workers, the use of workers from other parts of the business, increased supervision to ensure safe operation, and the establishment of temporary work sites. These activities have ensured that critical work continues safely and that there is minimal disruption to our customers. As a consequence, we have incurred additional costs of GBP97 million which have been classified as exceptional.

Our objective is to reach a fair settlement that allows the business to deliver vital services at a reasonable cost to customers, minimise any future cost increases and protect the agreements already in place with the other unions.

During the work contingency, we have continued to safely provide the service our customers expect, including the completion of almost 40,000 individual jobs.

In October, we had a minor incident in Woburn where, as a precaution, we shut off gas supply to 300 homes before testing the system and reconnecting the affected homes. No damage was caused. With this happening on the back of the tragic event in the Merrimack Valley, which is outside our gas service territory, the Massachusetts Department of Public Utilities (DPU) requested we only undertake mandatory and compliance work. We are currently working to resolve this moratorium, as well as keeping the DPU informed on the union negotiations.

UK businesses focused on delivering further cost savings under RIIO-T1

Our UK regulated operations continue to perform well in the sixth year of the eight year RIIO-T1 price control. Reliability remains strong while the businesses continue to drive efficiency and build on the significant total expenditure (totex) savings achieved for customers.

Organisational review of the UK business

During the first half of this year we commenced a multi-year programme covering a range of initiatives to drive further efficiency and lower costs for customers. These initiatives will continue our drive to become a more agile organisation that is positioned to be more responsive to customers. The range of initiatives include a flatter, leaner organisation, further economies of scale, simplifying our processes and ways of working, and making more efficient use of IT and back office activities.

To achieve the long-term benefits of these initiatives, we have provided for costs of GBP127 million in the first half of 2018/19, which we expect will help us generate opex savings of GBP50 million in 2019/20 and at least GBP100 million annually from 2020/21. We continue to expect to deliver outperformance of 200-300 basis points in each of the remaining years of RIIO-T1.

RIIO-T1 reopeners and Visual Impact Provision funding

Ofgem reached a final decision in September on funding for certain projects and programmes of work which were subject to reopeners as we entered RIIO-T1. We submitted four requests to adjust baseline allowances: additional allowances for data centres and cyber security; investments in our Gas Transmission compressor fleet to meet European emissions standards; asset health costs for the Feeder 9 pipeline replacement under the Humber Estuary; and funding for a Visual Impact Provision scheme for under-grounding overhead lines in Dorset.

We were pleased that Ofgem allowed the necessary funding for the investment in physical and cyber security in both electricity and gas transmission. However, we were disappointed not to receive funding for the compressor works, and we are now reviewing our approach to meeting the required environmental obligations. With regards to Feeder 9, Ofgem changed its initial decision on the needs case, awarding us GBP111 million to continue this project. On the Visual Impact Provision scheme, Ofgem made its final determination on 2 November awarding us GBP116 million.

RIIO-T2 preparation well underway

We welcome the RIIO Framework Decision document Ofgem published at the end of July, which provides a solid foundation as we move into the sector specific consultation phase later this year.

Ofgem confirmed that the key principles of RIIO-T1 will remain, namely incentives, innovation and output based regulation. Ofgem also emphasised the importance of RIIO-T2 being a stakeholder-engagement led process, which we advocated for, and in which we have experience through our US distribution businesses.

Whilst we are pleased with some decisions in the framework document, such as transition to CPIH (Consumer Price Index including Housing), and withdrawal of the proposal to cap returns, there remain areas that we will continue to discuss with Ofgem in the coming months. For example, we believe the cost of equity remains too low. We aim to achieve a fair return that is reflective of the level of risk in transmission networks, together with incentive opportunities to outperform that deliver benefits to customers and shareholders.

Sector specific consultations start towards the end of this year and we expect to see a gradual narrowing towards the final framework with initial proposals expected in mid-2020. Overall, we believe that RIIO-T2 must deliver a total financial package that can fund the necessary investment as well as fairly remunerate shareholders for this investment.

Solid first half for National Grid Ventures (NGV) and other activities

We continue to make good progress on the three interconnectors we have under construction, and have approved investment to proceed with the Viking interconnector to Denmark, subject to the resolution of a number of minor issues.

The Nemo Link, North Sea Link and IFA2 interconnectors remain on track, with important milestones over the last six months. North Sea Link has progressed cable laying, with 260 kilometres buried under the seabed. Good progress has also continued on IFA2, with completion of duct works in the cliffs at Chilling on the south coast. On Nemo Link, energisation and station testing is underway, and commissioning is expected before the end of March next year.

Our combined investment in these four interconnector projects will be over GBP2.1 billion. They are expected to contribute approximately GBP250 million annual EBITDA when fully operational by the mid-2020s.

Preliminary planning approval for Fulham property site

In our St. William joint venture, a planning application was submitted for over 1,800 new homes on the Fulham site during 2018. In October, the London Borough of Hammersmith and Fulham resolved to grant planning permission, subject to the agreement of a satisfactory Section 106 agreement dealing with the provision of affordable housing and other developer financial contributions. Over a third of the new homes built will be affordable. Subject to securing planning permission, site development is scheduled to start in 2019 and we expect the site will be transferred into the St. William joint venture during 2018/19.

Corporate centre

Corporate centre and other activities including Property contributed GBP76 million to operating profit during the half year, including GBP94 million of benefit from legal settlements to recover costs associated with a US systems implementation, in line with the treatment of the original costs.

GROWTH

Balanced portfolio to deliver asset growth and sustainable dividend

National Grid aims to deliver value to shareholders through maintaining a portfolio of businesses with strong operational performance alongside attractive annual asset growth of around 5 to 7% assuming long-run average UK RPI inflation of 3%. The Group aims to deliver this growth while maintaining an efficient balance sheet that allows continued funding of its investment programme, and maintaining the policy of aiming to increase dividend per share by at least RPI for the foreseeable future.

GBP2.1 billion of capital investment across the Group

We continued to make significant investment in energy infrastructure in the first six months of the year. Capital investment across the Group was GBP2,130 million, an increase of GBP136 million or 7% at constant currency compared to the first half of 2017/18.

 
 Six months ended 30 September                   At actual             At constant 
  Group capital investment                     exchange rates            currency 
                                         =========================  ================= 
 (GBPm)                                    2018    2017   % change    2017   % change 
======================================   ======  ======  =========  ======  ========= 
    UK Electricity Transmission             462     515       (10)     515       (10) 
    UK Gas Transmission                     153     157        (3)     157        (3) 
    US Regulated                          1,177   1,095          7   1,089          8 
    NG Ventures and other activities*       338     233         45     233         45 
    Group capital investment              2,130   2,000          7   1,994          7 
=======================================  ======  ======  =========  ======  ========= 
 

* NG Ventures and other activities capital investment includes equity and financing in joint ventures and associates but excludes GBP20m and GBP8m equity contribution to St. William property joint venture for 2018 and 2017, respectively.

Investment in the US Regulated business was GBP1,177 million for the first six months of this year, an increase of GBP88 million over the prior period at constant currency. The increase reflects mandated gas work across New York and Rhode Island, partly offset by a reduction of around GBP60m in capital expenditure in Massachusetts Gas during the implementation of the work contingency plan. The US business continues its significant investment in leak prone pipe replacement, enabling customer growth and reinforcing the electricity system to improve the safety and reliability of networks. This sustained level of investment was a key feature of the updated regulatory filings in the Rhode Island Electric and Gas and Massachusetts Gas businesses, and is expected to continue in future filings, supporting strong levels of rate base growth over the medium term.

The UK regulated businesses invested GBP615 million in the first half of 2018/19, with UK Electricity Transmission and UK Gas Transmission both investing in asset health to meet their respective Network Output Measures. Investment in our UK Electricity Transmission business was GBP53 million lower than the prior period, primarily reflecting lower non-load related investment.

National Grid Ventures and other activities investment increased by GBP105 million to GBP338 million in the first half of the year versus the prior period. Of this increase, GBP64 million reflected higher capital expenditure on the IFA2 (France) and North Sea Link (NSL) interconnectors, both of which continue to progress well.

FINANCIAL STRENGTH

Over GBP1 billion of new long-term financing

National Grid's balance sheet remains robust, with strong investment grade credit ratings from Moody's, Standard & Poor's and Fitch.

During the first six months of the year, National Grid raised over GBP1 billion of new long-term debt. All of the funding was for the US business, with the majority at holding company level. Net debt increased to GBP25.6 billion in the six months, GBP2.6 billion higher than at 31 March 2018 (GBP23.0 billion). This increase was driven by movement in exchange rates (GBP1.4 billion), and underlying business requirements (GBP1.2 billion).

Interim dividend of 16.08p, increased in line with policy

The Board has approved an interim dividend of 16.08p per ordinary share ($1.0616 per American Depositary Share). This represents 35% of the total dividend per share of 45.93p in respect of the last financial year to 31 March 2018 and is in line with the Group's dividend policy. The interim dividend is expected to be paid on 9 January 2019 to shareholders on the register as at 23 November 2018.

The Group's dividend policy is to aim to grow the ordinary dividend per share at least in line with the rate of UK RPI inflation each year for the foreseeable future. The 2018/19 interim dividend of 16.08p represents a 0.59p (3.8%) increase over the interim dividend for the year ended 31 March 2018 of 15.49p.

The scrip dividend alternative will again be offered in respect of the 2018/19 interim dividend. As previously announced, we do not expect to buy back the scrip shares issued during 2018/19 or 2019/20, unless there is sufficient balance sheet capacity.

Board changes

As previously announced, Andrew Bonfield stood down as Finance Director at the Annual General Meeting on 30 July 2018. Andy Agg, previously Group Tax and Treasury Director, is currently Interim CFO.

In May, we also announced that Pierre Dufour would be stepping down as a Non-executive Director of the Board with effect from the end of the Annual General Meeting.

In April 2018, we announced the appointment of Amanda Mesler as a Non-executive Director of the Board with effect from 17 May 2018. On appointment, Amanda joined the Audit, Finance and Nominations Committees of National Grid.

OUTLOOK

Following the refresh of our rate case programme, good financial performance is expected to continue in the US business. The UK business remains on track to deliver outperformance in the 200-300 bps range, and the contribution from National Grid Ventures and Other activities is expected to be above prior year.

Looking ahead, National Grid sees strong growth prospects across the Group. There are a wide range of growth drivers for the US, UK and NGV businesses, which are expected to deliver high quality asset growth of at least 7% for the next two years, and at the top end of our 5-7% range in the medium term.

The business continues to be well positioned with a balanced portfolio and an efficient balance sheet that underpins asset and dividend growth.

2018/19 TECHNICAL GUIDANCE

The outlook and technical guidance contained in this statement should be reviewed, together with the forward-looking statements set out in this release, in the context of the cautionary statement. It is prepared on the basis of the Group's continuing operations, excluding the results of Cadent which have been classified as a discontinued operation.

UK Electricity Transmission

Net Revenue (excluding timing) is expected to increase by approximately GBP80 million compared to 2017/18, reflecting inflationary increases on base revenues and revised system operator incentives.

Totex outperformance is expected to increase compared with 2017/18, partly reflecting the higher allowances available to us in the reopener decision as well as improved incentive performance. Overall Return on Equity outperformance is expected to be above the 200-300 bps range.

UK Gas Transmission

Net Revenue (excluding timing) is expected to decrease, with approximately GBP160 million of lower revenue allowances compared to 2017/18, primarily due to the return of revenues relating to the Avonmouth project through the annual MOD adjustment(2) .

Totex performance is expected to be lower than 2017/18 primarily reflecting lower allowances from the RIIO-T1 reopener decision. Incentive performance is also expected to be marginally lower. As a result Return on Equity is expected to be slightly lower than the allowed level in 2018/19.

UK Timing

Revenues will be impacted by timing of recoveries including impacts from prior years. Electricity Transmission is expected to under-recover by around an additional GBP100 million compared to 2017/18. Gas Transmission timing is expected to under-recover at a similar level to 2017/18.

US Regulated operations

Net Revenue (excluding timing) is expected to increase by about GBP80 million, reflecting the full year benefit of new rate case filings and capex trackers, partially offset by the impact of tax reform and the adoption of IFRS15. After inflationary impacts on operating costs and GBP56 million of storm costs, we expect underlying operating profit to be slightly below the prior year. The majority of storm costs are recoverable under regulatory mechanisms. Costs associated with the Massachusetts Gas workforce contingency plan are classified as an exceptional item and excluded from the underlying results.

Excluding the impact of the Massachusetts workforce contingency costs, Return on Equity for overall US Regulated operations is expected to remain at a similar level to the performance in 2017/18.

US Timing

US in-year timing is heavily influenced by volumetric impacts and commodity prices, particularly over the last quarter of the financial year. We expect payments of previously over-recovered NYSERDA balances to now reduce revenue by approximately $30 million during 2018/19.

National Grid Ventures and Other activities

Revenue is expected to increase year-on-year, mainly due to the forecast sale of the Fulham site to St. William in our Property business, subject to receiving appropriate planning consents. Profits from the Property business are expected to be almost double last year's level as a result of this and other sales. Other activities will also benefit from the GBP94 million of legal settlements. These benefits will be partially offset by the revenue impact of fewer domestic meters in the Metering business.

Joint Ventures and Associates

Our share of the profit after tax of joint ventures and associates (excluding Cadent) is expected to be broadly in line with the prior year.

Interest and Taxation

Net finance costs in 2018/19 are expected to increase, driven by higher average net debt and the non-repeat of gains on the disposal of available for sale investments, partially offset by lower RPI and the benefit of lower pension interest.

For the full year 2018/19, the underlying effective tax rate, excluding the share of joint venture and associate post-tax profits, is expected to reduce to around 21%.

Changes to accounting standards

No material impact on EPS is expected following the adoption of IFRS9 'Financial Instruments' and IFRS15 'Revenue from Contracts with Customers' in 2018/19.

Investment, Growth and Net Debt

Overall Group capital investment for 2018/19 is expected to be at a similar level to the GBP4.3 billion of investment in 2017/18. In our UK transmission businesses we expect to invest GBP1.2 billion; in our US Regulated business capex is expected to be slightly below the prior year level of $3.3 billion, in part due to lower investment in Massachusetts Gas. Investment in our NGV and Other businesses will increase reflecting investment in interconnector projects.

Depreciation is expected to increase, reflecting the impact of continued high levels of capital investment.

Operating cashflow generated from continuing operations is expected to reduce, including the impact of lower tax allowances in US revenues.

Net debt is expected to increase (excluding the impact of foreign exchange) from GBP25.6 billion at the half year, reflecting ongoing business cash requirements of approximately GBP1.3 billion.

Weighted average number of shares (WAV) is expected to increase from 3,367 million for the first half of the year to approximately 3,390 million reflecting the impact of scrip shares.

(2) In November 2017, Ofgem ran the financial models that calculate substantial elements of the revenue allowances for National Grid's UK regulated businesses. The outcome of these model runs (known as the 'MOD adjustments') were in line with National Grid's expectations.

FINANCIAL REVIEW

Unless otherwise stated, all financial commentary in this release is given on an underlying basis at actual exchange rates for continuing operations. The use of these alternative and regulatory performance (or non-IFRS) measures is intended to provide users with a clearer picture of the regulated performance of the business. This is in line with how management monitor and manage the business day-to-day. For definitions and metrics see pages 52 to 55 of this statement.

Profits and earnings from continuing operations

Six months ended 30 September

 
                                                        Statutory             Underlying 
                                                  =====================  --------------------- 
                                                   2018   2017   change   2018   2017   change 
At actual exchange rates                           GBPm   GBPm        %   GBPm   GBPm        % 
------------------------------------------------  -----  -----  -------  -----  -----  ------- 
UK Electricity Transmission                         437    542     (19)    556    540        3 
UK Gas Transmission                                  46    126     (63)     91    144     (37) 
US Regulated                                        327    448     (27)    431    526     (18) 
NG Ventures and other activities                    207    158       31    207    158       31 
------------------------------------------------  -----  -----  -------  -----  -----  ------- 
Total operating profit                            1,017  1,274     (20)  1,285  1,368      (6) 
Net finance costs                                 (520)  (514)      (1)  (494)  (542)        9 
 
Share of post-tax results of JVs and associates      25     20       25     25     20       25 
------------------------------------------------  -----  -----  -------  -----  -----  ------- 
Profit before tax                                   522    780     (33)    816    846      (4) 
Tax                                                (93)  (153)       39  (153)  (189)       19 
------------------------------------------------  -----  -----  -------  -----  -----  ------- 
Profit after tax                                    429    627     (32)    663    657        1 
------------------------------------------------  -----  -----  -------  -----  -----  ------- 
 
EPS                                               12.7p  17.7p     (28)  19.7p  18.5p        6 
------------------------------------------------  -----  -----  -------  -----  -----  ------- 
 

Definitions

In considering the financial performance of our business and segments, we use various adjusted profit measures in order to aid comparability of results year-on-year. The various measures are explained below and reconciled on pages 52 to 55.

Underlying - This is one of the measures used by management to assess the performance of the underlying business. This measure excludes exceptional items, remeasurements, timing and major storm costs. The impact of major storm costs is adjusted for when the total impact on the Group's performance in any one year is sufficiently large.

Constant currency - The underlying profits for prior periods are also shown on a constant currency basis to show the year-on-year comparisons excluding any impact of foreign currency movements. This basis is explained in more detail on page 52.

Operating profit and controllable costs

Statutory operating profit was GBP1,017m, down GBP257m (20%) compared with the prior period at actual exchange rates.

Underlying operating profit and controllable costs

Underlying operating profit for the first six months was GBP1,285m, down GBP83m against the same period last year at actual exchange rates. The year-on-year movement in exchange rates had a GBP4m adverse impact on underlying operating profit. On a constant currency basis, underlying operating profit was down GBP79m (6%).

 
 
 
   Six months ended 30 September 
   Over/(under)-recovery 
 (GBPm) - constant currency                              2018    2017   Change % 
===============================================        ======  ======  ========= 
    Balance at start of the period (restated)*            292     403       (28) 
    In-year (under)/over-recovery                        (83)   (108)         23 
================================================       ======  ======  ========= 
    Balance at end of period                              209     295       (29) 
================================================       ======  ======  ========= 
    Operating profit before exceptional 
     items and remeasurements                           1,202   1,256        (4) 
    Adjust for timing differences                          83     108       (23) 
================================================       ======  ======  ========= 
    Underlying operating profit (excluding 
     timing)                                            1,285   1,364        (6) 
================================================       ======  ======  ========= 
 *restated to reflect finalisation of UK and US timing balances 
 

Underlying operating profit from regulated activities decreased by GBP128m on a constant currency basis. Net regulated income decreased by GBP2m, driven by return of Avonmouth revenues in UK Gas Transmission. Regulated controllable costs increased by GBP18m while post-retirement costs decreased by GBP11m and US bad debts increased by GBP2m. Depreciation and amortisation increased by GBP34m and other costs increased by GBP83m, including increased US storm costs.

Underlying operating profit from National Grid Ventures and Other activities increased by GBP49m in the period on a constant currency basis with GBP94m of benefit from legal settlements partly offset by lower property profits in the first half of this year.

Interest

Adjusted net finance costs at GBP494m were GBP48m lower than the same period in 2017/18 at actual exchange rates, and GBP46m lower than 2017/18 at constant currency. This partly reflects lower pension interest costs and higher levels of interest capitalised.

The effective interest rate on Treasury managed debt for the period was 4.4% compared with 4.7% in the first six months of 2017/18.

Underlying profit before tax and taxation

The Group's share of post-tax results from joint ventures and associates was GBP25m, up by GBP5m from the same period in 2017/18, including a tax credit in respect of our investment in the partnership with Sunrun.

Underlying profit before tax was down 4% at actual exchange rates to GBP816m.

Underlying taxation was GBP153m, GBP36m lower than the prior period, reflecting lower profits and the reduction in the US federal corporate income tax rate to 21%. The underlying effective tax rate (excluding JVs and associates' profits) decreased to 19.3% compared to 22.9% in the previous period.

Other adjusted earnings metrics, EPS, exceptional and statutory earnings

After deducting earnings attributable to non-controlling interests of GBP1m, underlying earnings attributable to equity shareholders were GBP662m, up GBP6m compared with the same period in 2017/18. Underlying earnings per share increased 6% to 19.7p, benefiting from the lower share count that has resulted from the 2017/18 share consolidation and buy-back programme as part of the return of the proceeds from the UK Gas Distribution sale.

Timing reduced earnings by GBP64m in the first half of the year, reflecting the return of previously over-recovered revenues in the UK and the US. Exceptional items and remeasurements for continuing operations decreased statutory earnings by GBP170m after tax. A detailed breakdown of these items can be found on page 32. After these items and non-controlling interests, statutory continuing earnings attributable to equity shareholders were GBP428m and statutory continuing EPS was 12.7p.

Discontinued operations increased statutory earnings by GBP3m after tax. This included a negative impact of GBP45m from exceptional items. A breakdown of these items can be found on pages 34 to 35. Statutory earnings attributable to equity shareholders including discontinued operations were GBP431m, and statutory basic earnings per share including discontinued operations was 12.8p compared with 19.1p for the same period in the prior year. The decrease compared to the first half of 2017/18 partly reflects costs related to our UK restructuring programme and the Massachusetts workforce contingency plan. With effect from 30 June 2018 the investment in Quadgas HoldCo Limited was classified as held for sale.

Cash flow

Cash generated from continuing operations before taxation was GBP1,941m, GBP81m lower than 2017/18 reflecting increased levels of spend on exceptional items.

Funding and net debt

Net debt as at 30 September 2018 was GBP25.6bn, GBP2.6bn higher than at 31 March 2018 (GBP23.0bn). Movement in exchange rates accounted for GBP1.4bn of this increase, with underlying business requirements accounting for GBP1.2bn.

BUSINESS REVIEW

Six months ended 30 September

UK ELECTRICITY TRANSMISSION

Underlying operating profit in UK Electricity Transmission was GBP556m, up GBP16m for the first six months of the year compared to the same period in the prior year. Underlying net revenues increased GBP28m due to higher base revenues. This was partially offset by a higher depreciation charge.

Capital investment of GBP462m was GBP53m lower than the prior period. This reflects lower investment following the completion of several large non-load related projects. Overall investment in the period reflected GBP336m of non-load related investment whilst load related investment was GBP126m.

As previously reported, Western Link experienced technical faults during the commissioning phase. The link is now delivering up to 2,250MW power transfer capability from Scotland to England and Wales and we continue to monitor progress.

The business expects to deliver its regulatory outputs for the year at a cost below the associated regulatory totex allowance. This reflects continued delivery of efficiencies in the capital programme and non-load related maintenance activities and additional allowances from reopener filings.

In July, Ofgem chose a Competition Proxy Model as the regulatory framework for Hinkley-Seabank. We remain disappointed that Ofgem believe this is the right model for Hinkley-Seabank as we do not believe it will benefit consumers in the long term. We expect Ofgem to introduce changes to our licence by the end of this year, or early 2019, and we will consider all our options at that stage. However, we remain committed to delivering Hinkley-Seabank to time and to quality as per our licence obligations.

On 28 September, Ofgem published its decision to allow GBP65m of additional allowances for enhanced cyber security costs for the Electricity System Operator (ESO). The allowances relate to spend that has been made over the whole of the RIIO-T1 period. We expect recognition of allowances related to historic spend will benefit the Return on Equity reported in 2018/19.

On 2 November, Ofgem made their final determination on funding for the undergrounding of lines in an Area of Outstanding Natural Beauty in Dorset, awarding us GBP116m.

The separation of the ESO continues to go smoothly. We remain on track for a legally separate ESO from 1 April 2019.

UK GAS TRANSMISSION

Underlying operating profit in UK Gas Transmission was GBP91m, down GBP53m for the first six months of the year compared to the same period in the prior year, with lower underlying net revenues of GBP56m primarily due to the expected return of allowances related to Avonmouth that were received in prior years.

Capital investment of GBP153m was GBP4m lower than the prior period, driven by a small reduction in asset health spend in the period. We expect capital investment for the full year to be in line with the prior year.

On 28 September, Ofgem published its decision on a number of reopener filings made by Gas Transmission. Ofgem approved the needs case for additional asset health costs of GBP111m to fund the replacement of the high-pressure gas transmission pipeline under the Humber Estuary. They also approved additional allowances of GBP48m for enhanced cyber security costs, however disallowed a request to retain GBP123m of allowances in relation to the recovery of costs to upgrade compressors to comply with the Industrial Emissions Directive (IED). We are now reviewing our approach to meeting the required environmental obligations.

The UK Gas Transmission business expects to deliver its regulatory outputs at a level of totex above the associated regulatory allowance for this year. This includes the impact of lower allowances for the upgrade of our compressor fleet and our Humber Estuary (Feeder 9) pipeline replacement project. As a result, we expect to deliver a Return on Equity slightly lower than the allowed level in 2018/19. The business continues to focus on process improvements and innovation to increase efficiency over time and we expect to deliver close to the allowed level of return over the remainder of the RIIO-T1 period.

US REGULATED OPERATIONS

Underlying operating profit in the US Regulated business was GBP431m, down GBP95m for the first six months of the year, at actual exchange rates. This was driven by the impact of US tax reform and GBP56m impact from higher storm costs, the majority of which are recoverable through regulatory mechanisms.

Capital investment was GBP1,177m, GBP82m higher than the prior period at actual exchange rates. The majority of this investment relates to leak prone pipe replacement and gas system reinforcement in the gas businesses, and storm hardening and resilience across the electric networks. The increase versus the prior period reflects mandated gas work across New York and Rhode Island, partly offset by the impact on capital expenditure due to the Massachusetts Gas workforce contingency plan.

Operating company rate refresh completed

During the first six months, the US Regulated business completed the refresh of its rate case programme with all distribution companies now operating under rates following an update process that began in 2015. A rate case settlement was approved for our Rhode Island Electric and Gas businesses in August 2018, and a rate case order was issued for our Massachusetts Gas business in September 2018. The Rhode Island settlement, which lasts for three years, provides a 9.3% allowed Return on Equity, with annual capex of $240m providing further medium term clarity on our US growth rates. For Massachusetts Gas, the order provides a 9.5% allowed Return on Equity and annual capex of $413m. Together, these companies represent 19% of National Grid's US rate base. These new rates for Rhode Island Electric and Gas came into effect on 1 September 2018 and for Massachusetts Gas on 1 October 2018.

We plan to file a rate case for the Massachusetts Electric business in November 2018. The company represents over 10% of National Grid's US rate base. New rates would be expected to come into effect by 1 October 2019.

US tax reform

As we stated in May, the reduction in the federal tax rate from 35% to 21% will be significantly beneficial to customers. It will be economically neutral for utilities but will reduce cash flows in the near term.

We now have clarity on bill reductions for all our operating companies, including updates for KEDNY, KEDLI and Massachusetts Electric since May. The return of the $2.2bn deferred tax balance liability will now be made over an average period of up to 50 years. Rate base growth will increase due to the lower build-up of deferred taxes in the future. Over time this will be beneficial to operating profit and cash flow.

These items will collectively flow through the income statement over the next two years. 2018/19 will see a partial impact on operating profit of $210m, which is expected to be more than offset by the full year impact of the lower tax charge, representing a small benefit to full-year earnings. 2019/20 will have an additional impact to operating profit of around $110m. No significant in-year impact is expected on earnings as operating profit impact is offset by the lower tax rate.

NATIONAL GRID VENTURES AND OTHER ACTIVITIES

 
 Six months ended 30 September       Operating profit 
 (GBPm)                                 2018      2017 
================================   =========  ======== 
 Total National Grid Ventures            131       132 
 
 Property                                 38        53 
 Corporate and other activities           38      (27) 
=================================  =========  ======== 
 Total Other                              76        26 
---------------------------------  ---------  -------- 
 Total NG Ventures and other 
  activities                             207       158 
=================================  =========  ======== 
 
 
 Joint ventures and associates            Share of post-tax 
  Six months ended 30 September             profit/(loss) 
 (GBPm)                                      2018       2017 
=====================================   =========  ========= 
 Total National Grid Ventures                  31         24 
 St. William                                  (6)        (4) 
 Total joint ventures and associates           25         20 
======================================  =========  ========= 
 
 
 Six months ended 30 September       Capital investment 
 (GBPm)                                  2018       2017 
================================   ==========  ========= 
 Total National Grid Ventures             212        180 
 
 Property                                  11          5 
 Corporate and other activities           115         48 
=================================  ==========  ========= 
 Total Other                              126         53 
---------------------------------  ----------  --------- 
 Total NG Ventures and other 
  activities                              338        233 
=================================  ==========  ========= 
 

NATIONAL GRID VENTURES

For the first six months, National Grid Ventures made a GBP162m contribution to Group profit before tax, consisting of operating profit and post-tax share of JVs and associates earnings. Capital investment was GBP212m, up GBP32m versus the prior year.

Nemo Link, IFA2 and North Sea Link interconnector construction remain on track

We have reached important milestones over the last six months on our three interconnectors under construction; Nemo Link, IFA2 and North Sea Link, which remain on track for commissioning in 2018/19, 2020/21 and 2021/22 respectively.

On Nemo Link, energisation and station testing is underway, and we expect full testing to start in December, and commissioning before the end of March next year. On IFA2, we completed the horizontal drilling through the cliffs at Chilling on the south coast, with ducts installed ready to receive the six AC cables in the new year. On North Sea Link, we completed the first two cable laying campaigns, with 260 kilometres buried under the seabed so far and an additional 130km manufactured and transported to Norway ready to lay in 2019.

Approved investment decision on the Viking Link interconnector

We have approved investment to proceed with the Viking Link interconnector, subject to resolution of a number of minor issues. The 760km, 1.4GW HVDC interconnector between Bicker Fen in England and Revsing in Denmark will be a joint venture with Energinet, the Danish transmission owner, and will be the longest interconnector in the world. The link represents an GBP850m investment for the Group and is expected to eventually contribute around GBP100m of EBITDA annually after planned commissioning in 2023.

OTHER ACTIVITIES

We have decided to exercise the options over our remaining 39% share in Cadent and the sale is expected to complete at the end of June 2019, subject to customary regulatory approvals. As a result, the results of Cadent for this and the prior period have been classified as discontinued operations and are no longer included within underlying results.

The Property business delivered an operating profit of GBP38m, as a result of land sales at Wandsworth, Hornsey and Oxted, the latter two sites into the St. William joint venture.

Corporate and other activities profits were up GBP65m principally due to GBP94m of legal settlement benefits in line with the treatment of the original costs, partly offset by the absence of a prior year provision release.

Capital investment was up GBP73m to GBP126m, principally driven by upgrades to our IS systems and investment in gas business enablement projects in the US.

We have established a venture capital business called National Grid Partners, based in California. It will make modest investments to ensure we are at the forefront of technological developments relevant for our industry. Investments are focused on start-ups and small companies developing new technologies that will provide clear benefit to our existing businesses.

APPIX

Unless otherwise stated, all financial commentaries in this release are given on an underlying basis at actual exchange rates. Underlying represents statutory results excluding exceptional items, remeasurements, timing and major storm costs. The underlying basis is further defined on page 52.

Alternative Performance Measures derived from IFRS

The following are terms or metrics that are reconciled to IFRS measures and are defined on pages 52 to 55.

Net revenue

Adjusted profit measures

Underlying results

Constant currency

Timing impacts

Capital investment

Net debt - defined in note 11 on page 39.

PROVISIONAL FINANCIAL TIMETABLE

 
 8 November 2018                 2018/19 half year results 
 21 November 2018                ADRs go ex-dividend 
 22 November 2018                Ordinary shares go ex-dividend 
 23 November 2018                Record date for 2018/19 interim dividend 
 29 November 2018                Scrip reference price announced 
 7 December 2018 (5pm UK time)   Scrip Election Date for 2018/19 interim dividend 
 9 January 2019                  2018/19 interim dividend paid to qualifying shareholders 
 16 May 2019                     2018/19 Preliminary Results 
 30 May 2019                     Ordinary shares and ADRs go ex-dividend for 2018/19 final dividend 
 31 May 2019                     Record date for 2018/19 final dividend 
 6 June 2019                     Scrip reference price announced 
 17 July 2019 (5pm UK time)      Scrip Election Date for 2018/19 final dividend 
 29 July 2019                    2019 AGM 
 14 August 2019                  2018/19 final dividend paid to qualifying shareholders 
 

CAUTIONARY STATEMENT

This announcement contains certain statements that are neither reported financial results nor other historical information. These statements are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements include information with respect to National Grid's (the Company) financial condition, its results of operations and businesses, strategy, plans and objectives. Words such as 'aims', 'anticipates', 'expects', 'should', 'intends', 'plans', 'believes', 'outlook', 'seeks', 'estimates', 'targets', 'may', 'will', 'continue', 'project' and similar expressions, as well as statements in the future tense, identify forward-looking statements. These forward-looking statements are not guarantees of National Grid's future performance and are subject to assumptions, risks and uncertainties that could cause actual future results to differ materially from those expressed in or implied by such forward-looking statements. Many of these assumptions, risks and uncertainties relate to factors that are beyond National Grid's ability to control, predict or estimate precisely, such as changes in laws or regulations, including any arising as a result of the United Kingdom's exit from the European Union, announcements from and decisions by governmental bodies or regulators, including those relating to the role of the UK electricity system operator; the timing of construction and delivery by third parties of new generation projects requiring connection; breaches of, or changes in, environmental, climate change and health and safety laws or regulations, including breaches or other incidents arising from the potentially harmful nature of its activities; network failure or interruption, the inability to carry out critical non network operations and damage to infrastructure, due to adverse weather conditions including the impact of major storms as well as the results of climate change, due to counterparties being unable to deliver physical commodities, or due to the failure of or unauthorised access to or deliberate breaches of National Grid's IT systems and supporting technology; performance against regulatory targets and standards and against National Grid's peers with the aim of delivering stakeholder expectations regarding costs and efficiency savings, including those related to investment programmes and internal

transformation, cost efficiency and remediation plans; and customers and counterparties (including financial institutions) failing to perform their obligations to the Company. Other factors that could cause actual results to differ materially from those described in this announcement include fluctuations in exchange rates, interest rates and commodity price indices; restrictions and conditions (including filing requirements) in National Grid's borrowing and debt arrangements, funding costs and access to financing; regulatory requirements for the Company to maintain financial resources in certain parts of its business and restrictions on some subsidiaries' transactions such as paying dividends, lending or levying charges; inflation or deflation; the delayed timing of recoveries and payments in National Grid's regulated businesses and whether aspects of its activities are contestable; the funding requirements and performance of National Grid's pension schemes and other post-retirement benefit schemes; the failure to attract, train or retain employees with the necessary competencies, including leadership skills, and any significant disputes arising with National Grid's employees or the breach of laws or regulations by its employees; the failure to respond to market developments, including competition for onshore transmission, the threats and opportunities presented by emerging technology, development activities relating to changes in the energy mix and the integration of distributed energy resources; and the need to grow the Company's business to deliver its strategy, as well as incorrect or unforeseen assumptions or conclusions (including unanticipated costs and liabilities) relating to business development activity, including assumptions in connection with the Company's sale of the remaining Cadent stake. For further details regarding these and other assumptions, risks and uncertainties that may impact National Grid, please read the Strategic Report section and the 'Risk factors' on pages 193 to 196 of National Grid's most recent Annual Report and Accounts. In addition, new factors emerge from time to time and National Grid cannot assess the potential impact of any such factor on its activities or the extent to which any factor, or combination of factors, may cause actual future results to differ materially from those contained in any forward-looking statement. Except as may be required by law or regulation, the Company undertakes no obligation to update any of its forward-looking statements, which speak only as of the date of this announcement.

UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS

 
 Consolidated income statement 
 for the six months ended 30 
  September 
 2018 
                                         -------  ----------------------       --------------------         ------ 
 GBPm                                                      Before exceptional                  Exceptional 
                                          Notes      items and remeasurements     items and remeasurements      Total 
---------------------------------------  -------  ---------------------------  ---------------------------  --------- 
 Continuing operations 
  Revenue                                 2(a),3                   6,347                          -          6,347 
 Operating costs                            4                     (5,145)                      (185)        (5,330) 
---------------------------------------  -------  ----------------------       --------------------   ----  ------ 
 Operating profit/(loss)                  2(b),4                   1,202                       (185)         1,017 
 Finance income                             5                         42                          -             42 
 Finance costs                             4,5                      (536)                       (26)          (562) 
 Share of post-tax results of 
  joint ventures and associates            2(b)                       25                          -             25 
 Profit/(loss) before tax                 2(b),4                     733                       (211)           522 
 Tax                                       4,7                      (134)                        41            (93) 
---------------------------------------  -------  ----------------------       --------------------  -----  ------ 
 Profit/(loss) after tax from 
  continuing operations                     4                        599                       (170)           429 
 Profit/(loss) after tax from 
  discontinued operations                   6                         48                        (45)             3 
---------------------------------------  -------  ----------------------  ---  --------------------   ----  ------ 
 Total profit/(loss) for the 
  period (continuing and discontinued)                               647                       (215)           432 
---------------------------------------  -------  ----------------------  ---  --------------------   ----  ------ 
 
 Attributable to: 
 Equity shareholders of the 
  parent                                                             646                       (215)           431 
 Non-controlling interests(1)                                          1                          -              1 
---------------------------------------  -------  ----------------------  ---  --------------------  -----  ------ 
 
 Earnings per share (pence) 
 Basic earnings per share (continuing)      8                                                                 12.7 
 Diluted earnings per share 
  (continuing)                              8                                                                 12.6 
 Basic earnings per share (continuing 
  and discontinued)                         8                                                                 12.8 
 Diluted earnings per share 
  (continuing and discontinued)             8                                                                 12.7 
---------------------------------------  -------  ---------------------------  ---------------------------  ------ 
 
 2017(2) 
                                         -------  ----------------------       --------------------         ------ 
 GBPm                                                      Before exceptional                  Exceptional 
                                          Notes      items and remeasurements     items and remeasurements      Total 
---------------------------------------  -------  ---------------------------  ---------------------------  --------- 
 Continuing operations 
  Revenue                                  2(a)                    6,684                          -          6,684 
 Operating costs                            4                     (5,425)                        15         (5,410) 
---------------------------------------  -------  ----------------------       --------------------  -----  ------ 
 Operating profit                         2(b),4                   1,259                         15          1,274 
 Finance income                             5                         24                          -             24 
 Finance costs                             4,5                      (566)                        28           (538) 
 Share of post-tax results of 
  joint ventures and associates            2(b)                       20                          -             20 
 Profit before tax                        2(b),4                     737                         43            780 
 Tax                                       4,7                      (149)                        (4)          (153) 
---------------------------------------  -------  ----------------------       --------------------   ----  ------ 
 Profit after tax from continuing 
  operations                                4                        588                         39            627 
 Profit/(loss) after tax from 
  discontinued operations                   6                         67                        (17)            50 
---------------------------------------  -------  ----------------------  ---  --------------------   ----  ------ 
 Total profit for the period 
  (continuing and discontinued)                                      655                         22            677 
---------------------------------------  -------  ----------------------  ---  --------------------  -----  ------ 
 
 Attributable to: 
 Equity shareholders of the 
  parent                                                             654                         22            676 
 Non-controlling interests(1)                                          1                          -              1 
---------------------------------------  -------  ----------------------  ---  --------------------  -----  ------ 
 
 Earnings per share (pence) 
 Basic earnings per share (continuing)      8                                                                 17.7 
 Diluted earnings per share 
  (continuing)                              8                                                                 17.6 
 Basic earnings per share (continuing 
  and discontinued)                         8                                                                 19.1 
 Diluted earnings per share 
  (continuing and discontinued)             8                                                                 19.0 
---------------------------------------  -------  ---------------------------  ---------------------------  ------ 
 

1. The non-controlling interests for the six month periods ended 30 September 2018 and 2017 relate to continuing operations.

2. Comparatives have been re-presented to reflect the classification of our retained interest in Quadgas HoldCo Limited as a discontinued operation in the current period (see note 6).

 
 Consolidated statement of comprehensive income 
 for the six months ended 30 September 
                                                                 2018    2017(1) 
                                                                 GBPm       GBPm 
-------------------------------------------------------------  ------  --------- 
 
 Profit after tax from continuing operations                     429      627 
 
 Other comprehensive income/(loss) from continuing 
  operations 
 Items from continuing operations that will never 
  be reclassified to profit or loss: 
 Remeasurement gains on pension assets and post-retirement 
  benefit obligations                                            606      594 
 Net gains on investments in equity instruments designated 
  at fair value through other comprehensive income                 8        - 
 Net gains on financial liability designated at fair 
  value through profit and loss attributable to changes 
  in own credit risk                                               6        - 
 Net gains in respect of cash flow hedging of capital 
  expenditure                                                     13        - 
 Tax on items that will never be reclassified to profit 
  or loss                                                       (142)    (106) 
 
 Total items from continuing operations that will 
  never be reclassified to profit or loss                        491      488 
-------------------------------------------------------------  -----   ------ 
 
 Items from continuing operations that may be reclassified 
  subsequently to profit or loss: 
 Exchange adjustments                                            403     (262) 
 Net (losses)/gains in respect of cash flow hedges 
  and cost of hedging                                            (31)      16 
 Transferred to profit or loss in respect of cash 
  flow hedges and cost of hedging                                 27        6 
 Net gains on available-for-sale investments                        -      10 
 Net gains on investments in debt instruments measured 
  at fair value through other comprehensive income                 8        - 
 Tax on items that may be reclassified subsequently 
  to profit or loss                                                1       (3) 
 
 Total items from continuing operations that may be 
  reclassified subsequently to profit or loss                    408     (233) 
-------------------------------------------------------------  -----   ------ 
 
 Other comprehensive income for the period, net of 
  tax, from continuing operations                                899      255 
 Other comprehensive income for the period, net of 
  tax, from discontinued operations(2)                            36       64 
-------------------------------------------------------------  -----   ------ 
 
 Other comprehensive income for the period, net of 
  tax                                                            935      319 
-------------------------------------------------------------  -----   ------ 
 
 
 Total comprehensive income for the period from continuing 
  operations                                                   1,328      882 
 Total comprehensive income for the period from discontinued 
  operations                                                      39      114 
-------------------------------------------------------------  -----   ------ 
 
 Total comprehensive income for the period                     1,367      996 
-------------------------------------------------------------  -----   ------ 
 
 
 Attributable to: 
 Equity shareholders of the parent     1,365  996 
 Non-controlling interests(3)              2    - 
-----------------------------------  -------  --- 
 

1. Comparatives have been re-presented to reflect the classification of our retained interest in Quadgas HoldCo Limited as a discontinued operation in the current period (see note 6).

2. The other comprehensive income from discontinued operations relates to items of other comprehensive income of Cadent (investment held through Quadgas Holdco Limited), comprising GBP35m (2017: GBP60m) remeasurement gains on pension assets and post-retirement benefit obligations, and GBP1m (2017: GBP4m) net gains in respect of cash flow hedges. Both items are shown net of tax.

3. The non-controlling interests for the six month periods ending 30 September 2018 and 30 September 2017 relate to continuing operations.

 
 Consolidated statement of changes in equity 
 for the six months ended 30 September 
                                      Share                 Other             Total 
                            Share   premium   Retained     equity    share-holders'    Non-controlling       Total 
                          capital   account   earnings   reserves            equity          interests      equity 
                  Notes      GBPm      GBPm       GBPm       GBPm              GBPm               GBPm        GBPm 
 At 1 April 2018 
  (as previously 
  reported)                   452    1,321     21,599     (4,540)      18,832                16          18,848 
 Impact of 
  transition to 
  IFRS 9 and 
  IFRS 15           17          -         -      (268)        72         (196)                       -     (196) 
----------------  -----  --------  --------  --------   --------   ----------   ---  -----------------  ------- 
 At 1 April 2018 
  (as restated)               452    1,321     21,331     (4,468)      18,636                16          18,652 
 Profit for the 
  period                        -         -       431           -         431                 1             432 
 Other 
  comprehensive 
  income 
  for the period                -         -       505        429          934                 1             935 
----------------  -----  --------  --------  --------   --------   ----------  ----  ----------  -----  ------- 
 Total 
  comprehensive 
  income 
  for the period                -         -       936        429        1,365                 2           1,367 
 Equity 
  dividends         9           -         -      (710)          -        (710)                       -     (710) 
 Scrip dividend 
  related share 
  issue                         5       (5)          -          -                 -                  -           - 
 Issue of 
  treasury 
  shares                        -         -        16           -          16                        -       16 
 Purchase of own 
  shares                        -         -        (2)          -          (2)                       -       (2) 
 Share-based 
  payment                       -         -        16           -          16                        -       16 
 Cash flow 
  hedges 
  transferred 
  to the 
  statement of 
  financial 
  position, net 
  of tax                        -         -          -        (4)          (4)                       -       (4) 
 
 At 30 September 
  2018                        457     1,316     21,587    (4,043)            19,317                 18      19,335 
----------------  -----  --------  --------  ---------  ---------  ----------------  -----------------  ---------- 
 
                                      Share                 Other             Total 
                            Share   premium   Retained     equity    share-holders'    Non-controlling       Total 
                          capital   account   earnings   reserves            equity          interests      equity 
                  Notes      GBPm      GBPm       GBPm       GBPm              GBPm               GBPm        GBPm 
 At 1 April 2017              449    1,324     22,582     (3,987)      20,368                16          20,384 
 Profit for the 
  period                        -        -        676          -          676                 1             677 
 Other 
  comprehensive 
  income/(loss) 
  for the period                -        -        548       (228)         320                (1)            319 
----------------  -----  --------  -------   --------   --------   ----------  ----  ----------   ----  ------- 
 Total 
  comprehensive 
  income/(loss) 
  for the period                -        -      1,224       (228)         996                 -             996 
 Equity 
  dividends         9           -        -     (4,141)         -       (4,141)                -          (4,141) 
 Scrip dividend 
  related share 
  issue                         1       (1)         -          -            -                 -               - 
 Issue of 
  treasury 
  shares                        -        -         28          -           28                 -              28 
 Purchase of 
  treasury 
  shares                        -        -       (413)         -         (413)                -            (413) 
 Purchase of own 
  shares                        -        -         (5)         -           (5)                -              (5) 
 Share-based 
  payment                       -        -         23          -           23                 -              23 
 
 At 30 September 
  2017                        450    1,323     19,298     (4,215)      16,856                16          16,872 
----------------  -----  --------  -------   --------   --------   ----------  ----  ----------  -----  ------- 
 
 
 Consolidated statement of financial position 
                                                        30 September 
                                                                2018    31 March 2018 
                                                 Notes          GBPm             GBPm 
----------------------------------------------  ------  ------------  --------------- 
 
 Non-current assets 
 Goodwill                                                     5,860          5,444 
 Other intangible assets                         2(c)           990            899 
 Property, plant and equipment                   2(c)        42,661         39,853 
 Other non-current assets                                        96            115 
 Pension assets                                   13          1,754          1,409 
 Financial and other investments                                613            899 
 Investments in joint ventures and associates                   670          2,168 
 Derivative financial assets                      10          1,159          1,319 
 Total non-current assets                                    53,803         52,106 
----------------------------------------------  ------  -----------   ------------ 
 
 Current assets 
 Inventories and current intangible assets                      440            341 
 Trade and other receivables                                  2,335          2,798 
 Current tax assets                                              89            114 
 Financial and other investments                 11,12        1,658          2,694 
 Derivative financial assets                      10            189            405 
 Cash and cash equivalents                       11,12          130            329 
 Assets held for sale                              6          2,121              - 
----------------------------------------------  ------  -----------   ------------ 
 Total current assets                                         6,962          6,681 
----------------------------------------------  ------  -----------   ------------ 
 
 Total assets                                                60,765         58,787 
----------------------------------------------  ------  -----------   ------------ 
 
 Current liabilities 
 Borrowings                                      11,12       (4,134)        (4,447) 
 Derivative financial liabilities                 10           (355)          (401) 
 Trade and other payables                                    (3,144)        (3,453) 
 Contract liabilities                             17            (26)             - 
 Current tax liabilities                                       (137)          (123) 
 Provisions                                                    (379)          (273) 
 Liabilities held for sale                         6            (50)             - 
 Total current liabilities                                   (8,225)        (8,697) 
----------------------------------------------  ------  -----------   ------------ 
 
 Non-current liabilities 
 Borrowings                                      11,12      (23,510)       (22,178) 
 Derivative financial liabilities                 10           (780)          (660) 
 Other non-current liabilities                                 (868)        (1,317) 
 Contract liabilities                             17           (834)             - 
 Deferred tax liabilities                                    (3,902)        (3,636) 
 Pensions and other post-retirement benefit 
  obligations                                     13         (1,424)        (1,672) 
 Provisions                                                  (1,887)        (1,779) 
----------------------------------------------  ------  -----------   ------------ 
 Total non-current liabilities                              (33,205)       (31,242) 
----------------------------------------------  ------  -----------   ------------ 
 
 Total liabilities                                          (41,430)       (39,939) 
----------------------------------------------  ------  -----------   ------------ 
 
 Net assets                                                  19,335         18,848 
----------------------------------------------  ------  -----------   ------------ 
 Equity 
 Share capital                                                  457            452 
 Share premium account                                        1,316          1,321 
 Retained earnings                                           21,587         21,599 
 Other equity reserves                                       (4,043)        (4,540) 
----------------------------------------------  ------  -----------   ------------ 
 
 Total shareholders' equity                                  19,317         18,832 
 Non-controlling interests                                       18             16 
----------------------------------------------  ------  -----------   ------------ 
 
 Total equity                                                19,335         18,848 
----------------------------------------------  ------  -----------   ------------ 
 
 
 Consolidated cash flow statement 
 for the six months ended 30 September                          2018    2017(1) 
                                                      Notes     GBPm       GBPm 
---------------------------------------------------  ------  -------  --------- 
 Cash flows from operating activities 
 Operating profit from continuing operations          2(b)    1,017    1,274 
 Adjustments for: 
  Exceptional items and remeasurements                  4       185      (15) 
  Depreciation and amortisation                       2(c)      791      762 
  Share-based payment charge                                     16       23 
  Changes in working capital                                    190      153 
  Changes in provisions                                         (10)     (51) 
  Changes in pensions and other post-retirement 
   benefit obligations                                         (128)    (124) 
 Cash flows relating to exceptional items                      (120)       - 
 
 Cash generated from continuing operations                    1,941    2,022 
 Tax (paid)/received                                             (6)      46 
---------------------------------------------------  ------ 
 
 Net cash flow from operating activities 
  - continuing operations                                     1,935    2,068 
---------------------------------------------------  ------  ------   ------ 
 
 Net cash flow used in operating activities 
  - discontinued operations(2)                                  (47)    (126) 
---------------------------------------------------  ------  ------   ------ 
 
 Cash flows from investing activities 
 Acquisition of investments(3)                                  (19)      (1) 
 Investments in joint ventures and associates                   (84)     (77) 
 Loans to joint ventures and associates                         (11)     (38) 
 Purchases of intangible assets                                (140)     (73) 
 Purchases of property, plant and equipment                  (1,765)  (1,768) 
 Disposals of property, plant and equipment                      10        2 
 Dividends received from joint ventures 
  and associates                                                 33       29 
 Interest received                                               31       20 
 Net movements in short-term financial investments            1,157    6,130 
---------------------------------------------------  ------  ------   ------ 
 
 Net cash flow (used in)/from investing 
  activities - continuing operations                           (788)   4,224 
---------------------------------------------------  ------  ------   ------ 
 
 Net cash flow from investing activities 
  - discontinued operations(4)                          6        78       15 
 
 Cash flows from financing activities 
 Purchase of own shares                                          (2)      (5) 
 Proceeds from issue of treasury shares                          16       28 
 Purchase of treasury shares                                      -     (413) 
 Proceeds received from loans                                 1,116    1,091 
 Repayments of loans                                         (1,575)  (1,471) 
 Net movements in short-term borrowings 
  and derivatives                                               208   (1,717) 
 Interest paid                                                 (433)    (421) 
 Dividends paid to shareholders                                (710)  (4,141) 
---------------------------------------------------  ------  ------   ------ 
 
 Net cash flow used in financing activities 
  - continuing operations                                    (1,380)  (7,049) 
---------------------------------------------------  ------  ------   ------ 
 
 Net cash flow used in financing activities 
  - discontinued operations(5)                                    -     (231) 
---------------------------------------------------  ------  ------   ------ 
 
 Net decrease in cash and cash equivalents             12      (202)  (1,099) 
 Exchange movements                                               3       (1) 
 Net cash and cash equivalents at start 
  of period                                                     329    1,139 
---------------------------------------------------  ------  ------   ------ 
 
 Net cash and cash equivalents at end of 
  period                                                        130       39 
---------------------------------------------------  ------  ------   ------ 
 
 

1. Comparatives have been re-presented to reflect the classification of our retained interest in Quadgas HoldCo Limited as a discontinued operation in the current period (see note 6).

2. Cash flows used in discontinued operating activities in both 2018 and 2017 related to the disposal of the UK Gas Distribution business.

   3.     Acquisition of investments includes Technology and Innovation investments. 

4. Cash flows from discontinued investing activities relates to the receipt of GBP66m (2017: GBPnil) of dividends and GBP12m (2017: GBP15m) of interest on the shareholder loan from our investment in Quadgas HoldCo Limited (see note 6).

5. Cash flows used in discontinued financing activities in 2017 related to the liability management programme related to the UK Gas Distribution business.

Notes to the financial statements

   1.   Basis of preparation and new accounting standards, interpretations and amendments 

The half year financial information covers the six month period ended 30 September 2018 and has been prepared in accordance with IAS 34 'Interim Financial Reporting' as issued by the International Accounting Standards Board (IASB) and as adopted by the European Union (EU); and the Disclosure and Transparency Rules of the Financial Conduct Authority. This condensed set of financial statements comprises the unaudited financial information for the half years ended 30 September 2018 and 2017, together with the audited consolidated statement of financial position at 31 March 2018.

The financial information for the year ended 31 March 2018 does not constitute statutory accounts as defined in Section 434 of the Companies Act 2006. It should be read in conjunction with the statutory accounts for the year ended 31 March 2018, which were prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the IASB and as adopted by the EU, and have been filed with the Registrar of Companies. The Deloitte LLP audit report on these statutory accounts was unqualified, did not contain an emphasis of matter and did not contain a statement under Section 498 of the Companies Act 2006.

The half year financial information has been prepared in accordance with the accounting policies expected to be applicable for the year ending 31 March 2019. The notes to the financial statements have been prepared on a continuing basis unless otherwise stated. The Group has adopted IFRS 9 'Financial Instruments' and IFRS 15 'Revenue from Contracts with Customers' for the first time with effect from 1 April 2018. Other than in this respect, the half year financial statements have been prepared on a basis consistent with that applied in the preparation of the financial statements for the year ended 31 March 2018, other than as outlined below in relation to discontinued operations.

Our consolidated income statement and segmental analysis (see note 2) separately identify financial results before and after exceptional items and remeasurements. The Directors believe that presentation of the results in this way is relevant to an understanding of the Group's financial performance. Presenting financial results before exceptional items and remeasurements is consistent with the way that financial performance is measured by management and reported to the Board and Executive Committee and improves the comparability of reported financial performance from year to year.

Events or transactions which are classified as exceptional items or remeasurements are defined in the Annual Report and Accounts and Form 20-F.

We continue to adopt a columnar presentation as we consider it improves the clarity of the presentation, and is consistent with the way that financial performance is measured by management and reported to the Board and Executive Committee, and better enables users of the financial statements to understand the results. The inclusion of total profit for the period from continuing operations before exceptional items and remeasurements forms part of the incentive target set annually for remunerating certain Executive Directors and accordingly we believe it is important for users of the financial statements to understand how this compares to our results on a statutory basis and period on period.

Areas of judgement and key sources of estimation uncertainty

In preparing this half year financial information, the areas where judgement has been exercised by management in applying the Group's accounting policies and the key sources of estimation uncertainty remain consistent with those applied to the Annual Report and Accounts for the year ended 31 March 2018.

In applying the Group's exceptional items framework for the half year, we have considered three key matters. As described further in note 4, we have concluded that the costs associated with the Massachusetts Gas work continuation (GBP97m) and the UK cost efficiency and restructuring programme (GBP127m) should be treated as exceptional. We also considered whether the GBP94m income from two legal settlements received in the period should also be classified as exceptional. However, we concluded it was appropriate to recognise the income in earnings before exceptional items (within Other Activities), in line with the treatment of the original costs.

In addition, in preparing the half year financial information, we have exercised our judgement in concluding that it is appropriate to classify our investment in and shareholder loan to Quadgas HoldCo Limited (Quadgas), along with the related Further Acquisition Agreement (FAA) and Remaining Acquisition Agreement (RAA) derivatives, as held for sale and as a discontinued operation, as detailed in note 6.

   1.   Basis of preparation and new accounting standards, interpretations and amendments (continued) 

Going concern

Having made enquiries and reassessed the principal risks, the Directors consider that the Company and its subsidiary undertakings have adequate resources to continue in business for the foreseeable future, being a period of not less than 12 months from the date of this report. Accordingly, it is appropriate to adopt the going concern basis in preparing the half year financial information.

New IFRS accounting standards and interpretations adopted in the period

The Group has adopted IFRS 9 'Financial Instruments' and IFRS 15 'Revenue from Contracts with Customers' for the first time with effect from 1 April 2018. Refer to note 17 for details of the impact and transition adjustments arising on adoption.

There are no other new standards, interpretations and amendments, issued by the IASB or by the IFRS Interpretations Committee (IFRIC), that are applicable for the period commencing on 1 April 2018 that have had a material impact on the Group's results.

New IFRS accounting standards and interpretations not yet adopted

The Group continues to assess the impact of IFRS 16 'Leases', which will be implemented on 1 April 2019. The Group enters into a significant number of operating lease transactions. Under IFRS 16, our operating leases will be accounted for on the consolidated statement of financial position as 'right-of-use' assets. This treatment will increase both our assets and liabilities and subsequently, will result in an increase in finance costs and depreciation and a reduction in operating costs.

We continue to assess our revenue, service contracts and power purchase contracts to determine whether we have the right to use assets under those contracts and whether they fall within the scope of IFRS 16. We plan to apply IFRS 16 using the modified retrospective approach, whereby comparatives will not be restated on adoption of the new standard but instead a cumulative adjustment will be reflected in retained earnings. We will provide further details of the impact that the implementation of IFRS 16 will have in the Annual Report and Accounts for the year ending 31 March 2019.

There are no new accounting standards and amendments to existing standards that have been issued, but are not yet effective or have not yet been endorsed by the EU that were not disclosed in our Annual Report and Accounts. The Group has not early adopted any standard, amendment or interpretation that has been issued but is not yet effective.

2. Segmental analysis

We present revenue and the results of the business analysed by operating segment, based on the information the Board of Directors uses internally for the purposes of evaluating the performance of operating segments and determining resource allocation between operating segments. The Board is National Grid's chief operating decision-making body (as defined by IFRS 8 'Operating Segments') and assesses the profitability of operations principally on the basis of operating profit before exceptional items and remeasurements (see note 4). As a matter of course, the Board also considers profitability by segment, excluding the effect of timing.

The following table describes the main activities for each reportable operating segment:

 
 UK Electricity Transmission   The high voltage electricity transmission network 
                                in England and Wales and Great Britain system operator. 
----------------------------  --------------------------------------------------------- 
 UK Gas Transmission           The high pressure gas transmission network and system 
                                operator in Great Britain. 
----------------------------  --------------------------------------------------------- 
 US Regulated                  Gas distribution networks, electricity distribution 
                                networks and high voltage electricity transmission 
                                networks in New York and New England and electricity 
                                generation facilities in New York. 
----------------------------  --------------------------------------------------------- 
 

National Grid Ventures (NGV) does not meet the thresholds set out in IFRS 8 to be identified as a separate reportable segment and therefore its results have not been disaggregated. Other activities that do not form part of any of the segments in the above table primarily relate to UK property development together with insurance and corporate activities in the UK and US and the Group's investments in Technology and Innovation companies.

Sales between operating segments are priced having regard to the regulatory and legal requirements to which the businesses are subject. The analysis of revenue by geographical area is on the basis of destination. There are no material sales between the UK and US geographical areas.

The US Regulated segment typically experiences seasonal fluctuations in revenue and operating profit due to higher delivery volumes during the second half of the financial year, for example as a result of extreme weather over the winter. These seasonal fluctuations have a consequential impact on the working capital balances (primarily trade debtors and accrued income) in the consolidated statement of financial position at 30 September 2018 when compared to 31 March 2018. The majority of UK revenues are governed by the arrangements under RIIO, through which revenue is primarily based on availability of transmission capacity rather than usage, and therefore are not subject to the same seasonal fluctuations as in the US.

(a) Revenue

 
 Six months ended 30 September                   2018      2017 
                                                 GBPm      GBPm 
--------------------------------------------- 
 Operating segments - continuing operations: 
    UK Electricity Transmission                1,574   2,076 
    UK Gas Transmission                          353     422 
    US Regulated                               4,053   3,799 
 NGV and Other(1)                                387     407 
 Sales between segments                          (20)    (20) 
---------------------------------------------  -----   ----- 
 
 Total revenue from continuing operations      6,347   6,684 
---------------------------------------------  -----   ----- 
 
 Geographical areas: 
    UK                                         2,272   2,865 
    US                                         4,075   3,819 
---------------------------------------------  -----   ----- 
 
 Total revenue from continuing operations      6,347   6,684 
---------------------------------------------  -----   ----- 
 

1. Included within NGV and Other is GBP294m (2017: GBP294m) of revenue relating to NGV and GBP44m (2017: GBP59m) of revenue relating to UK property development.

2. Segmental analysis (continued)

(b) Operating profit

 
                                                 Before exceptional                After exceptional 
                                             items and remeasurements(1)       items and remeasurements(1) 
 Six months ended 30 September                       2018            2017             2018              2017 
                                                     GBPm            GBPm             GBPm              GBPm 
----------------------------------------  ---------------  --------------  ---------------  ---------------- 
 Operating segments - continuing 
  operations: 
   UK Electricity Transmission                        531             542              437             542 
   UK Gas Transmission                                 79             126               46             126 
   US Regulated                                       385             433              327             448 
 NGV and Other(2, 3)                                  207             158              207             158 
----------------------------------------  ---------------  --------------  ---------------  -------------- 
 
 Total operating profit from continuing 
  operations                                        1,202           1,259            1,017           1,274 
----------------------------------------  ---------------  --------------  ---------------  -------------- 
 
 Geographical areas 
   UK                                                 761             852              634             852 
   US                                                 441             407              383             422 
----------------------------------------  ---------------  --------------  ---------------  -------------- 
 
 Total operating profit from continuing 
  operations                                        1,202           1,259            1,017           1,274 
----------------------------------------  ---------------  --------------  ---------------  -------------- 
 

Below we reconcile total operating profit to profit before tax from continuing operations. Operating exceptional items and remeasurements of GBP94m expense (2017: GBPnil) detailed in note 4 are attributable to UK Electricity Transmission; GBP33m expense (2017: GBPnil) to UK Gas Transmission; and GBP58m expense (2017: GBP15m income) to US Regulated operations.

 
                                                     Before exceptional                   After exceptional 
                                                 items and remeasurements(1)          items and remeasurements(1) 
 Six months ended 30 September                           2018              2017               2018              2017 
                                                         GBPm              GBPm               GBPm              GBPm 
------------------------------------------  -----------------  ----------------  -----------------  ---------------- 
 Reconciliation to profit before 
  tax: 
 Operating profit - continuing operations           1,202             1,259              1,017             1,274 
 Share of post-tax results of joint 
  ventures and associates                              25                20                 25                20 
 Finance income                                        42                24                 42                24 
 Finance costs                                       (536)             (566)              (562)             (538) 
------------------------------------------  -------------      ------------      -------------      ------------ 
 
 Profit before tax from continuing 
  operations                                          733               737                522               780 
------------------------------------------  -------------      ------------      -------------      ------------ 
 

1. Comparatives have been re-presented to reflect the classification of our retained interest in Quadgas HoldCo Limited as a discontinued operation in the current period (see note 6).

2. Included within NGV and Other is GBP131m (2017: GBP132m) of operating profit (both before and after exceptional items and remeasurements) relating to NGV and GBP38m (2017: GBP53m) of operating profit (both before and after exceptional items and remeasurements) relating to UK property development.

3. NGV and Other includes gains of GBP94m (2017: GBPnil) in relation to cash received in respect of two legal settlements.

2. Segmental analysis (continued)

(c) Other segmental information

 
                          Net book value(1)         Capital expenditure(2)             Depreciation and 
                                                                                        amortisation(3) 
                       30 September  31 March       30 September  30 September    30 September    30 September 
                               2018      2018               2018          2017            2018            2017 
                               GBPm      GBPm               GBPm          GBPm            GBPm            GBPm 
---------------------  ------------  --------  -----------------  ------------  --------------  -------------- 
 Operating segments: 
 UK Electricity 
  Transmission               13,247    13,028                462           515        (242)           (226) 
 UK Gas Transmission          4,345     4,280                153           157         (92)            (94) 
 US Regulated                23,395    20,953              1,177         1,095        (346)           (328) 
 NGV and Other(4, 5)          2,664     2,491                248           125        (111)           (114) 
---------------------  ------------  --------  -----------------  ------------  ----------      ---------- 
 
 Total from 
  continuing 
  operations                 43,651    40,752              2,040         1,892        (791)           (762) 
---------------------  ------------  --------  -----------------  ------------  ----------      ---------- 
 
 Geographical areas: 
 UK                          19,094    18,772                782           751        (399)           (393) 
 US                          24,557    21,980              1,258         1,141        (392)           (369) 
                       ------------  --------  -----------------  ------------  ----------      ---------- 
 
 Total from 
  continuing 
  operations                 43,651    40,752              2,040         1,892        (791)           (762) 
---------------------  ------------  --------  -----------------  ------------  ----------      ---------- 
 
 By asset type: 
 Property, plant and 
  equipment                  42,661    39,853              1,900         1,820        (710)           (689) 
 Non-current 
  intangible 
  assets                        990       899                140            72         (81)            (73) 
---------------------  ------------  --------  -----------------  ------------  ----------      ---------- 
 
 Total from 
  continuing 
  operations                 43,651    40,752              2,040         1,892        (791)           (762) 
---------------------  ------------  --------  -----------------  ------------  ----------      ---------- 
 

1. Represents the net book value of property, plant and equipment and other non-current intangible assets at 30 September 2018 and 31 March 2018 respectively.

2. Represents additions to property, plant and equipment and other non-current intangibles, in the six months ended 30 September 2018 and 30 September 2017 respectively.

3. Represents the amounts recorded in the consolidated income statement for the six months ended 30 September 2018 and 30 September 2017 respectively.

4. Included within NGV and Other are assets with a net book value of GBP1,518m and GBP60m (31 March 2018: GBP1,454m and GBP52m), capital expenditures of GBP136m and GBP11m (2017: GBP72m and GBP5m) and depreciation and amortisation of GBP64m and GBP1m (2017: GBP68m and GBPnil) relating to NGV and UK property development respectively.

5. Net book value for NGV and Other includes certain software assets and properties in the US which are outside the US rate base and operate for the benefit of our US regulated businesses. Costs associated with owning and operating these assets (principally depreciation and amortisation) are recharged to the US regulated business.

3. Revenue

IFRS 15 'Revenue from Contracts with Customers' is effective for periods from 1 April 2018. As explained further in note 17, the standard has been applied prospectively and therefore the analysis below is only provided for the current period. The impact of adoption on the opening balance sheet and reserves is not material, with the main change being in relation to customer connection income.

Under IFRS 15, revenue is recorded as or when the Group satisfies a performance obligation by transferring a promised good or service to a customer. A good or service is transferred when the customer obtains control of that good or service.

The transfer of control of our distribution or transmission services coincides with the use of our network, as electricity and gas pass through our network and reach our customers. The Group principally satisfies its performance obligations over time and the amount of revenue recorded corresponds to the amounts billed and accrued for volumes of gas and electricity delivered/transferred to/from our customers. The revenue recognition policies for the non-regulated businesses are not impacted by the adoption of IFRS 15.

Note 17 includes the quantification of the impact for the half year if revenue were still to have been accounted for under IAS 18.

 
 Revenue for the six months      UK Electricity  UK Gas Transmission                NG Ventures 
  ended 30 September 2018          Transmission                 GBPm  US Regulated    and Other    Total 
                                           GBPm                               GBPm         GBPm     GBPm 
-------------------------------  --------------  -------------------  ------------  -----------  ------- 
 Revenue under IFRS 15 
 Transmission                             1,559                  322           315          152  2,348 
 Distribution                                 -                    -         3,478            -  3,478 
 Other(1)                                     -                    -             -          138    138 
-------------------------------  --------------  -------------------  ------------  -----------  ----- 
 
 Total IFRS 15 revenue                    1,559                  322         3,793          290  5,964 
-------------------------------  --------------  -------------------  ------------  -----------  ----- 
 Other revenue(2) 
 Generation                                   -                    -           183            -    183 
 Other                                        3                   25            77           95    200 
-------------------------------  --------------  -------------------  ------------  -----------  ----- 
 
 Total other revenue                          3                   25           260           95    383 
-------------------------------  --------------  -------------------  ------------  -----------  ----- 
 
 Total revenue from continuing 
  operations                              1,562                  347         4,053          385  6,347 
-------------------------------  --------------  -------------------  ------------  -----------  ----- 
 
 
 
 Geographic split of revenue     UK Electricity  UK Gas Transmission                NG Ventures 
  for the six months ended         Transmission                 GBPm  US Regulated    and Other    Total 
  30 September 2018                        GBPm                               GBPm         GBPm     GBPm 
-------------------------------  --------------  -------------------  ------------  -----------  ------- 
 Revenue under IFRS 15 
 UK                                       1,559                  322             -          290  2,171 
 US                                           -                    -         3,793            -  3,793 
 
 Total IFRS 15 revenue                    1,559                  322         3,793          290  5,964 
-------------------------------  --------------  -------------------  ------------  -----------  ----- 
 Other revenue 
 UK                                           3                   25             -           73    101 
 US(2)                                        -                    -           260           22    282 
-------------------------------  --------------  -------------------  ------------  -----------  ----- 
 
 Total other revenue                          3                   25           260           95    383 
-------------------------------  --------------  -------------------  ------------  -----------  ----- 
 
 Total revenue from continuing 
  operations                              1,562                  347         4,053          385  6,347 
-------------------------------  --------------  -------------------  ------------  -----------  ----- 
 
   1.     Other IFRS 15 revenue relates to revenue generated from metering businesses. 

2. Other revenue principally consists of income relating to US generation contracts where we act as lessor under the leasing standard (IAS 17).

4. Exceptional items and remeasurements

Exceptional items and remeasurements are items of income and expenditure that, in the judgement of the Directors, should be disclosed separately on the basis that they are important to an understanding of our financial performance and significantly distort the comparability of financial performance between periods.

Remeasurements comprise gains or losses recorded in the consolidated income statement arising from changes in the fair value of certain financial assets and liabilities categorised as held at fair value through profit and loss. These include financial assets that fail the solely payments of principal and interest test, financial liabilities designated at fair value through profit and loss excluding gains and losses attributable to changes in the Company's own credit risk, commodity contracts and derivative financial instruments used in our financing activities to the extent that hedge accounting is either not achieved or is not effective.

 
                                                         Exceptional 
 Six months ended 30 September 2018                            items    Remeasurements    Total 
                                                                GBPm              GBPm     GBPm 
-----------------------------------------------------  -------------  ----------------  ------- 
 
 Included within operating profit from 
  continuing operations 
 UK cost efficiency and restructuring programme(1)          (127)               -       (127) 
 Massachusetts Gas work continuation(2)                      (97)                        (97) 
 Net gains on commodity contract derivatives3(i)               -               39         39 
-----------------------------------------------------  ---------      -----------  ---  ---- 
                                                            (224)              39       (185) 
 Included within net finance costs (note 
  5) 
 Net losses on derivative financial instruments3(ii)           -              (26)       (26) 
 Net gains on FVTPL financial assets3(iii)                     -                8          8 
 Net losses on FVTPL financial liabilities3(iv)                -               (8)        (8) 
                                                               -              (26)       (26) 
 
 Total included within profit before tax 
  from continuing operations                                (224)              13       (211) 
 Tax                                                          48               (7)        41 
-----------------------------------------------------  ---------      -----------       ---- 
 
 Total exceptional items and remeasurements 
  after tax from continuing operations                      (176)               6       (170) 
-----------------------------------------------------  ---------      -----------  ---  ---- 
 
 
                                                      Exceptional 
 Six months ended 30 September 2017                      items(4)    Remeasurements(4)    Total(4) 
                                                             GBPm                 GBPm        GBPm 
----------------------------------------------------  -----------  -------------------  ---------- 
 
 Included within operating profit from 
  continuing operations 
 Net gains on commodity contract derivatives3(i)                -            15             15 
----------------------------------------------------  -----------  ------------  -----  ------ 
                                                                -            15             15 
 Included within net finance costs (note 
  5) 
 Net gains on derivative financial instruments3(ii)             -            28             28 
----------------------------------------------------  -----------  ------------  -----  ------ 
                                                                             28             28 
 
 Total included within profit before tax 
  from continuing operations                                    -            43             43 
 Tax                                                            -            (4)            (4) 
----------------------------------------------------  -----------  ------------   ----  ------ 
 
 Total exceptional items and remeasurements 
  after tax from continuing operations                          -            39             39 
----------------------------------------------------  -----------  ------------  -----  ------ 
 

1. UK cost efficiency and restructuring programme: In July 2018, our UK business consulted on a series of significant restructuring activities relating to our core UK regulated activities in anticipation of the upcoming RIIO-T2 price control. During the period we completed a comprehensive review of the organisational structure, certain operational activities, and relevant roles and responsibilities across Electricity Transmission and Gas Transmission, with changes communicated ahead of 30 September. By 30 September 2018 we had provided over GBP100m associated with severance costs, with the remainder of the GBP127m exceptional charge relating to associated support and planning costs. We expect some further costs will be incurred during the second half of the year as we complete our transition. On the basis that this item is material for the half year results and the full year financial statements, we have treated the costs as exceptional. The cash outflow for the period was GBP18m.

4. Exceptional items and remeasurements (continued)

2. Massachusetts Gas work continuation: On 25 June 2018, National Grid implemented a workforce contingency plan across its Massachusetts Gas business following the expiration of contracts for the existing workforce. Since then we have employed experienced contractors alongside supervisors and workers from other areas of our business to ensure work continues safely. In view of the significance of this item to the half year results and on the basis that it will be material to the full year financial statements, we have treated the incremental direct and associated incidental costs as exceptional. As at 30 September 2018, the incremental costs totalled $127m (GBP97m). The total cash outflow related to the work continuation for the period was $134m (GBP102m).

   3.   Remeasurements on derivative financial instruments: 

i. Net gains/(losses) on commodity contract derivatives represent mark-to-market movements on certain physical and financial commodity contract obligations in the US. These contracts primarily relate to the forward purchase of energy for supply to customers, or to the economic hedging thereof, that are required to be measured at fair value and do not qualify for hedge accounting. Under the existing rate plans in the US, commodity costs are recoverable from customers although the timing of recovery may differ from the pattern of costs incurred.

ii. Net gains/(losses) on derivative financial instruments comprise gains/(losses) arising on derivative financial instruments reported in the consolidated income statement in relation to our debt financing and foreign exchange hedging of the investment funds held by our insurance captives. These exclude gains and losses for which hedge accounting has been effective, and have been recognised directly in other comprehensive income or are offset by adjustments to the carrying value of debt.

iii. Net gains/(losses) on fair value through profit and loss (FVTPL) financial assets comprise gains/(losses) on the investment funds held by our insurance captives and Group money market fund investments which are categorised as fair value through profit and loss (see note 17).

iv. Net gains/(losses) on FVTPL financial liabilities comprises the change in the fair value (excluding changes due to own credit risk) of a financial liability that has been designated at fair value through profit and loss on transition to IFRS 9 to reduce a measurement mismatch (see note 17).

4. Comparatives have been re-presented to reflect the classification of our retained interest in Quadgas HoldCo Limited as a discontinued operation in the current period (see note 6).

5. Finance income and costs

 
 Six months ended 30 September                          2018     2017 
                                                Notes   GBPm     GBPm 
---------------------------------------------  ------  -----  ------- 
 
 Finance income before exceptional items 
  and remeasurements 
 Interest income on financial instruments(1)             42     24 
---------------------------------------------  ------  ----   ---- 
                                                         42     24 
 Finance costs before exceptional items and 
  remeasurements 
 Net interest payable on pensions and other 
  post-retirement benefit obligations                   (11)   (33) 
 Interest expense on financial instruments             (555)  (546) 
 Unwinding of discount on provisions                    (35)   (38) 
 Other interest                                          (9)    (8) 
 Less: Interest capitalised                              74     59 
                                                       (536)  (566) 
 
 Net finance costs before exceptional items 
  and remeasurements                                   (494)  (542) 
 Total exceptional items and remeasurements       4     (26)    28 
---------------------------------------------  ------  ----   ---- 
 
 Net finance costs including exceptional 
  items and remeasurements from continuing 
  operations                                           (520)  (514) 
---------------------------------------------  ------  ----   ---- 
 

1. Comparatives have been re-presented to reflect the classification of GBP15m of interest income in respect of our loan to Quadgas as a discontinued operation in the current period (see note 6).

6. Held for sale and discontinued operations - Interests in Quadgas HoldCo Limited

On 31 March 2017, the Group sold 61% of its UK Gas Distribution business to Quadgas BidCo Limited (the Consortium) and retained 39% of the business. At the same time, we and the Consortium also entered into a Further Acquisition Agreement (FAA) in a put/call arrangement to sell a further 14% of our investment in the business between 1 March 2019 and 30 June 2019 (our put, having given at least six months' notice) or between 1 July 2019 to 31 October 2019 (the Consortium's call, having given six months' notice).

On 1 May 2018, we announced that we had entered into a Remaining Acquisition Agreement (RAA) with the Consortium for the remaining 25% stake in the business under an agreement similar to the FAA. The pricing under the RAA is less favourable to the Group, however, in all other material aspects, the RAA is similar to the FAA, in particular as regards the windows for the notice to be given and exercise of the put and call options.

In our 2018 financial statements, the aggregate carrying value of our investment in Quadgas at 31 March 2018 was GBP2.1bn, determined with reference to the future proceeds expected to be received under the FAA and RAA.

We have decided to exercise the options over our remaining 39% interest in Cadent and the sale is expected to complete at the end of June 2019, subject to customary regulatory approvals.

Assets and liabilities held for sale

Under IFRS, the reclassification of assets (and any associated liabilities) as 'held for sale' can only be triggered once the assets are available for sale in their present condition and the sale is 'highly probable'. The highly probable criteria is met when the sale is expected to be completed within a year. We have therefore classified our interests in Quadgas as 'held for sale' with effect from 30 June 2018, since we expect to exit our investment on 30 June 2019. At 31 March 2018, we had no such expectation of sale completion within a year.

The aggregate carrying value of the assets and liabilities we will exit was GBP2.1bn at 30 September 2018, reflecting the total proceeds that remain to be received. No discounting has been applied on the basis that the period to exercise is now less than a year. The value allocated to each element of the Quadgas disposal group at 30 September 2018 is as follows:

   --     the shareholder loan receivable is valued at par of GBP0.4bn; 

-- the RAA derivative liability(1) is valued at GBP43m, being GBPnil less any cash proceeds relating to the RAA received to date;

-- the FAA derivative asset(1) is valued at GBP87m and has been determined by comparing the pricing mechanism within the FAA against that in the RAA less cash proceeds relating to the FAA received to date; and

   --     the residual balance of GBP1.6bn has been allocated to the investment in associate. 

Treatment as a discontinued operation

We consider that the exercise of our put options is the final stage of the plan to dispose of our interest in the UK Gas Distribution business first announced in 2015, and have accordingly treated the results and cash flows arising from Quadgas as a discontinued operation in the current period on the basis that the sale forms part of 'a single coordinated plan' to dispose of UK Gas Distribution. As a consequence, we have classified the various elements of income, expense and cash flows within discontinued operations as set out below, with comparatives also re-presented accordingly:

Consolidated income statement - discontinued operations:

-- GBP38m of income arising from our post-tax share of the profits of Quadgas Holdco Limited for the three months to 30 June 2018(2) (2017: GBP52m);

-- GBP12m of shareholder loan interest receivable (and tax thereon) for the six months to 30 September 2018; (2017: GBP15m);

-- Impairment charge of GBP43m (treated as a non-deductible expense for tax purposes), largely offsetting the gains recognised through other comprehensive income in relation to Quadgas' defined benefit pensions arrangement, and GBP2m of other costs for the three months to 30 June 2018 (2017: GBPnil); and

   --     Tax charge of GBP2m (2017: GBP3m). 

6. Held for sale and discontinued operations - Interests in Quadgas HoldCo Limited (continued)

Consolidated cash flow statement - discontinued operations:

   --     GBP66m of dividends received in the period (2017: GBPnil); and 
   --     GBP12m of interest received on the shareholder loan (2017: GBP15m). 

Consolidated statement of other comprehensive income - discontinued operations:

-- A gain of GBP35m relating to pensions, net of deferred tax, for the three month period to 30 June 2018(2) (2017: GBP60m); and

-- GBP1m of gains in respect of cash flow hedges for the three month period to 30 June 2018(2) (2017: GBP4m).

1. The RAA and FAA are both level 3 financial instruments. No sensitivity analysis is provided in respect of the FAA and RAA derivatives. The price at which we will exit our interest in Quadgas HoldCo Limited is fixed, and accordingly reflected in the aggregate carrying value of the disposal group. Any change in the fair value of these derivatives at 30 September would have been offset by equal and opposite adjustments to the carrying value of our equity interest, with nil net impact on profit and loss for the period.

2. Once the assets are treated as 'held for sale' equity accounting ceases for our investment in our associate. We therefore ceased to record our share of profits and share of gains/losses recorded within other comprehensive income from this date.

7. Tax from continuing operations

The tax charge for the six month period is GBP93m (2017 re-presented: GBP153m), and excluding tax on exceptional items and remeasurements, is GBP134m (2017 re-presented: GBP149m). The effective tax rate excluding tax on exceptional items and remeasurements is 18.3% (2017 re-presented: 20.2%), which includes our share of post-tax results of joint ventures and associates and is based on the best estimate of the weighted average annual income tax rate by jurisdiction expected for the full year. The current period rate reflects the seasonality of earnings in the US.

For the full year, we expect the Group effective tax rate to be around 20% excluding tax on exceptional items and remeasurements. This includes the effect of the reduction in the US corporate tax rate resulting from the Tax Cuts and Jobs Act (Tax Reform). The effective tax rate for the year ended 31 March 2018 (re-presented) was (33.4)%, and 23.4% before exceptional items and remeasurements.

Further details on Tax Reform are provided on page 119 of the Annual Report and Accounts. The Finance Act 2016 which was enacted on 15 September 2016, reduced the main rate of corporation tax in the UK to 17% with effect from 1 April 2020. UK deferred tax balances have been calculated at this rate.

8. Earnings per share

Earnings per share, excluding exceptional items and remeasurements, are provided to reflect the business performance subtotals used by the Group, as set out in note 1. For further details of exceptional items and remeasurements, see note 4. The earnings per share calculations are based on profit after tax attributable to equity shareholders of the parent company which excludes non-controlling interests.

   (a)    Basic earnings per share 
 
                                                     2018        2018     2017(1)       2017(1) 
                                                 Earnings    Earnings    Earnings      Earnings 
 Six months ended 30 September                              per share                 per share 
                                                     GBPm       Pence        GBPm         Pence 
-----------------------------------------------  --------  ----------  ----------  ------------ 
 
 Profit after tax before exceptional items 
  and remeasurements - continuing                    598        17.8      587           16.6 
 Exceptional items and remeasurements after 
  tax - continuing                                  (170)       (5.1)      39            1.1 
-----------------------------------------------  -------   ---------   ------      --------- 
 Profit after tax from continuing operations 
  attributable to the parent                         428        12.7      626           17.7 
-----------------------------------------------  -------   ---------   ------      --------- 
 
 Profit after tax before exceptional items 
  and remeasurements - discontinued                   48         1.4       67            1.9 
 Exceptional items and remeasurements after 
  tax - discontinued                                 (45)       (1.3)     (17)          (0.5) 
 Profit after tax from discontinued operations 
  attributable to the parent                           3         0.1       50            1.4 
-----------------------------------------------  -------   ---------   ------      --------- 
 
 Total profit after tax before exceptional 
  items and remeasurements                           646        19.2      654           18.5 
 Total exceptional items and remeasurements 
  after tax                                         (215)       (6.4)      22            0.6 
 Total profit after tax attributable to 
  the parent                                         431        12.8      676           19.1 
-----------------------------------------------  -------   ---------   ------      --------- 
 
                                                             Millions                  Millions 
-----------------------------------------------  --------  ----------  ----------  ------------ 
 Weighted average number of shares - basic(2)                  3,367                   3,539 
-----------------------------------------------  --------  ---------   ----------  --------- 
 
   (b)    Diluted earnings per share 
 
                                                      2018        2018     2017(1)       2017(1) 
                                                  Earnings    Earnings    Earnings      Earnings 
 Six months ended 30 September                               per share                 per share 
                                                      GBPm       Pence        GBPm         Pence 
------------------------------------------------  --------  ----------  ----------  ------------ 
 
 Profit after tax before exceptional items 
  and remeasurements - continuing                     598        17.7      587           16.5 
 Exceptional items and remeasurements after 
  tax - continuing                                   (170)       (5.1)      39            1.1 
------------------------------------------------  -------   ---------   ------      --------- 
 Profit after tax from continuing operations 
  attributable to the parent                          428        12.6      626           17.6 
------------------------------------------------  -------   ---------   ------      --------- 
 
 Profit after tax before exceptional items 
  and remeasurements - discontinued                    48         1.4       67            1.9 
 Exceptional items and remeasurements after 
  tax - discontinued                                  (45)       (1.3)     (17)          (0.5) 
 Profit after tax from discontinued operations 
  attributable to the parent                            3         0.1       50            1.4 
------------------------------------------------  -------   ---------   ------      --------- 
 
 Total profit after tax before exceptional 
  items and remeasurements                            646        19.1      654           18.4 
 Total exceptional items and remeasurements 
  after tax                                          (215)       (6.4)      22            0.6 
------------------------------------------------  -------   ---------   ------      --------- 
 Total profit after tax attributable to 
  the parent                                          431        12.7      676           19.0 
------------------------------------------------  -------   ---------   ------      --------- 
 
                                                              Millions                  Millions 
------------------------------------------------  --------  ----------  ----------  ------------ 
 Weighted average number of shares - diluted(2)                 3,381                   3,554 
------------------------------------------------  --------  ---------   ----------  --------- 
 

1. Comparatives have been re-presented to reflect the classification of our retained interest in Quadgas HoldCo Limited as a discontinued operation in the current period (see note 6).

2. The weighted average number of shares for the six month period ended 30 September 2017 includes the effect of the share consolidation, special dividend and share buy-back programme that took place in the three month period following the sale of the UK Gas Distribution business on 31 March 2017, as described in the Annual Report and Accounts.

9. Dividends

 
                                                  Pence  Cash dividend        Scrip 
                                                    per           paid     dividend 
                                                  share           GBPm         GBPm 
-----------------------------------------------  ------  -------------  ----------- 
 Ordinary dividends 
   Final dividend in respect of the year ended 
    31 March 2018                                 30.44            710        319 
   Special dividend - June 2017                  84.375          3,171          - 
   Final dividend in respect of the year ended 
    31 March 2017                                 29.10            970         33 
-----------------------------------------------  ------  -------------  --------- 
 

The Directors are proposing an interim dividend of 16.08p per share to be paid in respect of the year ending 31 March 2019. This would absorb approximately GBP547m of shareholders' equity. An interim dividend for the year ended 31 March 2018 of 15.49p per share was paid in January 2018. The cash dividend paid was GBP346m with an additional GBP176m settled via a scrip issue.

10. Fair value measurement

Assets and liabilities measured at fair value

Certain of the Group's assets and liabilities are measured at fair value. The following table categorises these assets and liabilities by the valuation methodology applied in determining their fair value using the fair value hierarchy described on page 163 of the Annual Report and Accounts.

 
                                       30 September 2018                 31 March 2018 
                                 Level   Level  Level    Total  Level   Level  Level      Total 
                                     1       2      3     GBPm      1       2      3       GBPm 
                                  GBPm    GBPm   GBPm            GBPm    GBPm   GBPm 
------------------------------  ------  ------  -----  -------  -----  ------  -----  --------- 
 Assets 
 Available-for-sale 
  investments(1)                    -       -      -        -   2,406    310      5    2,721 
 Investments held at 
  FVTPL                         1,194       -     25    1,219       -      -      -        - 
 Investments held at 
  FVTOCI                          108     338      -      446       -      -      -        - 
 Investments in associates(2)       -       -     87       87       -      -     79       79 
 Financing derivatives              -   1,246      1    1,247       -  1,544      1    1,545 
 Commodity contract 
  derivatives                       -      18     83      101       -      8     61       69 
 Further Acquisition 
  Agreement derivative(3)           -       -      -        -       -      -    110      110 
------------------------------  -----   -----   ----   ------   -----  -----   ----   ------ 
 
                                1,302   1,602    196    3,100   2,406  1,862    256    4,524 
------------------------------  -----   -----   ----   ------   -----  -----   ----   ------ 
 Liabilities 
 Financing derivatives              -    (828)  (194)  (1,022)      -   (725)  (220)    (945) 
 Commodity contract 
  derivatives                       -     (33)   (80)    (113)      -    (54)   (62)    (116) 
 Liabilities held at 
  fair value                     (645)      -      -     (645)      -      -      -        - 
------------------------------  -----   -----   ----   ------   -----  -----   ----   ------ 
 
                                 (645)   (861)  (274)  (1,780)      -   (779)  (282)  (1,061) 
------------------------------  -----   -----   ----   ------   -----  -----   ----   ------ 
 
 Total                            657     741    (78)   1,320   2,406  1,083    (26)   3,463 
------------------------------  -----   -----   ----   ------   -----  -----   ----   ------ 
 

1. With effect from 1 April 2018 and the adoption of IFRS 9, the available-for-sale investments have been reclassified to investments held at fair value through profit and loss (FVTPL) or investments held at fair value through other comprehensive income (FVTOCI). See note 17.

2. Our level 3 investments include investments relating to Sunrun Neptune 2016 LLC accounted for at FVTPL.

3. The Group is party to the Further Acquisition Agreement (FAA) and Remaining Acquisition Agreement (RAA) which contain put and call options over 14% and 25% respectively, of the loan and equity it holds in Cadent (through its investment in Quadgas HoldCo Limited). The fair value of the FAA was deemed to be GBP110m at 31 March 2018. See note 6 for further details.

The estimated fair value of total borrowings using market values at 30 September 2018 is GBP30,466m (31 March

2018: GBP30,164m).

Our level 1 financial investments and liabilities held at fair value are valued using quoted prices from liquid markets.

Our level 2 financial investments held at fair value are valued using quoted prices for similar instruments in active markets, or quoted prices for identical or similar instruments in inactive markets. Alternatively, they are valued using models where all significant inputs are based directly or indirectly on observable market data.

10. Fair value measurement (continued)

Our level 2 derivative financial instruments include cross-currency, interest rate and foreign exchange derivatives. We value our level 2 derivatives by discounting all future cash flows by externally sourced market yield curves at the reporting date, taking into account the credit quality of both parties. These derivatives can be priced using liquidly traded interest rate curves and foreign exchange rates, therefore we classify our vanilla trades as level 2 under the IFRS 13 framework.

Our level 2 commodity derivatives include over-the-counter (OTC) gas swaps and power swaps as well as forward physical gas deals. We value our contracts based on market data obtained from the New York Mercantile Exchange (NYMEX) and the Intercontinental Exchange (ICE) where monthly prices are available. We discount based on externally sourced market yield curves at the reporting date, taking into account the credit quality of both parties and liquidity in the market. Our commodity contracts can be priced using liquidly traded swaps, therefore we classify our vanilla trades as level 2 under the IFRS 13 framework.

Our level 3 derivative financial instruments include cross-currency swaps, inflation linked swaps and equity options, all of which are traded on illiquid markets. In valuing these instruments we use in-house valuation models and obtain external valuations to support each reported fair value. In addition we also use internally developed models to value Limited Price Index (LPI) derivatives where the inflation curve is illiquid. Inputs include breakeven rates and inflation option premiums which are increasingly illiquid, towards the long-dated points on the curve.

Our level 3 commodity contract derivatives primarily consist of our forward purchases of electricity and gas where pricing inputs are unobservable, as well as other complex transactions. Complex transactions can introduce the need for internally developed models based on reasonable assumptions. Industry standard valuation techniques such as the Black-Scholes pricing model and Monte Carlo simulation are used for valuing such instruments. Level 3 is also applied in cases when optionality is present or where an extrapolated forward curve is considered unobservable. All published forward curves are verified to market data; if forward curves differ from market data by 5% or more they are considered unobservable.

Our level 3 investment in Sunrun Neptune 2016 LLC is fair valued by discounting expected cashflows using a weighted average cost of capital specific to Sunrun Neptune 2016 LLC.

The impacts on a post-tax basis of reasonably possible changes in significant assumptions used in valuing assets and liabilities classified within level 3 of the fair value hierarchy are as follows:

 
                                           Financing derivatives         Commodity contract 
                                              within net debt                derivatives 
                                               (see note 11) 
 Six months ended 30 September                   2018          2017            2018       2017 
                                                 GBPm          GBPm            GBPm       GBPm 
 10% increase in commodity prices              -              -              1          (2) 
 10% decrease in commodity prices              -              -             (2)          2 
 +10% market area price change                 -              -             (8)         (7) 
 -10% market area price change                 -              -              7           5 
 +20 basis point increase in Limited 
  Price Index (LPI) market curve(1)          (81)           (85)             -           - 
 -20 basis point decrease in LPI 
  market curve(1)                             79             82              -           - 
-------------------------------------  ---------  ---  --------      ---------  ---  ----- 
 

1. A reasonably possible change in assumption of other level 3 derivative financial instruments is unlikely to result in a material change in fair values.

The impacts disclosed above were considered on a contract by contract basis with the most significant unobservable inputs identified.

For our level 3 investments, the sensitivity of the fair value of our investment in Sunrun Neptune 2016 LLC, using a 50 basis point increase/decrease in the discount rate would decrease/increase the fair value by GBP(4) million/GBP4 million (2017: GBP(4) million/GBP4 million) respectively. The additional investments categorised as level 3 were acquired in the period on market terms and sensitivity is considered insignificant at 30 September 2018.

10. Fair value measurement (continued)

The changes in fair value of our level 3 financial assets and liabilities in the six months to 30 September are presented below:

 
                                             Financing derivatives 
                                                within net debt            Commodity contract 
                                                 (see note 11)                 derivatives           Other(3) 
                                                   2018          2017          2018         2017    2018    2017 
                                                   GBPm          GBPm          GBPm         GBPm    GBPm    GBPm 
---------------------------------------  --------------  ------------  ------------  -----------  ------  ------ 
 At 1 April                                   (219)          (465)           (1)         (16)       194    46 
 Net gains/(losses) through the 
  consolidated income statement 
  for the period(1, 2)                          26              8           (16)          (1)         4    (2) 
 Net gains through other comprehensive 
  income for the period                          -              -             -            -          6     - 
 Transfer to held for sale                       -              -             -            -       (110)    - 
 Purchases                                       -              -             6            -         21    35 
 Settlements                                     -            231            13           26         (2)    - 
 
 At 30 September                              (193)          (226)            2            9        113    79 
---------------------------------------  ---------       --------      --------      -------      -----   --- 
 

1. Gains of GBP26m (2017: gains of GBP5m) are attributable to derivative financial instruments held at the end of the reporting period.

2. Losses of GBP11m (2017: losses of GBP1m) are attributable to commodity contract derivative financial instruments held at the end of the reporting period.

3. Other comprises our investments in Sunrun Neptune 2016 LLC and Embala and the investments made by the Group Technology and Innovation function, which are accounted for at fair value through profit and loss. In addition, the opening balance also includes the Further Acquisition Agreement and Remaining Acquisition Agreement derivatives of GBP110m that were recognised at 31 March 2018, and have been subsequently reclassified to held for sale (see note 6).

   4.      There were no reclassifications out of level 3 (2017: none). 

11. Net debt

Net debt comprises our cash and cash equivalents, borrowings and any derivatives thereon (financing derivatives). It also includes current financial investments. Net debt excludes commodity contract derivatives and the derivatives associated with our interest in Quadgas (see note 6).

 
                                                 30 September    31 March 
                                                         2018        2018 
                                                         GBPm        GBPm 
-----------------------------------------------  ------------  ---------- 
 
 Cash, cash equivalents and current financial 
  investments                                          1,788     3,023 
 Borrowings and bank overdrafts                      (27,644)  (26,625) 
 Financing derivatives(1)                                225       600 
 
 Net debt (net of related derivative financial 
  instruments)                                       (25,631)  (23,002) 
-----------------------------------------------  -----------   ------- 
 

1. Includes GBP76m (2017: GBP67m) in relation to capital expenditure. The cash flows for these derivatives are included within investing activities and not financing activities in the consolidated cash flow statement.

The following table splits out the total derivative balances on the face of the consolidated statement of financial position by category:

 
                                       30 September 2018               31 March 2018 
                                   Assets  Liabilities  Total  Assets  Liabilities    Total 
                                     GBPm         GBPm   GBPm    GBPm         GBPm     GBPm 
--------------------------------  -------  -----------  -----  ------  -----------  ------- 
 Financing derivatives              1,247      (1,022)   225    1,545        (945)   600 
 Commodity contract derivatives       101        (113)   (12)      69        (116)   (47) 
 Further Acquisition Agreement 
  derivative                            -           -      -      110           -    110 
--------------------------------  -------  ----------   ----   ------  ----------   ---- 
 
 Total derivative financial 
  instruments                       1,348      (1,135)   213    1,724      (1,061)   663 
--------------------------------  -------  ----------   ----   ------  ----------   ---- 
 

12. Analysis of changes in net debt

 
                                            Cash and     Financial                   Financing 
                                    cash equivalents   investments  Borrowings     derivatives       Total 
                                                GBPm          GBPm        GBPm            GBPm        GBPm 
-------------------------------  -------------------  ------------  ----------  --------------  ---------- 
 
 At 31 March 2018                           329             2,694     (26,625)         600      (23,002) 
 Impact of transition to IFRS 
  9                                           -                 -         (32)           -          (32) 
-------------------------------  --------------  ---  -----------   ---------   ----------      ------- 
 
 At 1 April 2018 (as restated)              329             2,694     (26,657)         600      (23,034) 
 Cash flows(1)                             (202)           (1,171)        424          260         (689) 
 Fair value gains and losses 
  and exchange movements                      3                95        (851)        (620)      (1,373) 
 Interest income/(charge)(2)                  -                16        (540)         (15)        (539) 
 Other non-cash movements                     -                24         (20)           -            4 
-------------------------------  --------------  ---  -----------   ---------   ----------      ------- 
 
 30 September 2018                          130             1,658     (27,644)         225      (25,631) 
-------------------------------  --------------  ---  -----------   ---------   ----------      ------- 
 
 
                                          Cash and     Financial                   Financing 
                                  cash equivalents   investments  Borrowings     derivatives       Total 
                                              GBPm          GBPm        GBPm            GBPm        GBPm 
-----------------------------  -------------------  ------------  ----------  --------------  ---------- 
 
 At 31 March 2017                        1,139            8,741     (28,638)        (516)     (19,274) 
 Cash flows                             (1,099)          (6,148)      2,592          144       (4,511) 
 Fair value gains and losses 
  and exchange movements                    (1)             (40)        522          789        1,270 
 Interest income/(charge)(2)                 -               20        (546)           5         (521) 
 Other non-cash movements                    -                -         (39)           -          (39) 
-----------------------------  ---------------      -----------   ---------   ----------      ------- 
 
 30 September 2017                          39            2,573     (26,109)         422      (23,075) 
-----------------------------  ---------------      -----------   ---------   ----------      ------- 
 

1. Cash flows excludes GBP17m (2017: GBPnil) interest received in relation to a litigation settlement, which is included within interest received within investing activities in the consolidated cash flow statement.

2. Exceptional income of GBPnil (2017: GBP3m) is included in net interest charge on the components of net debt and an exceptional cash inflow of GBPnil (2017: GBP3m) is included in net interest paid on the components of net debt.

13. Pensions and other post-retirement benefit obligations

 
                                                    30 September 
                                                            2018    31 March 2018 
                                                            GBPm             GBPm 
--------------------------------------------------  ------------  --------------- 
 
 Present value of funded obligations                    (23,601)       (23,747) 
 Fair value of plan assets                               24,307         23,858 
--------------------------------------------------  -----------   ------------ 
                                                            706            111 
 Present value of unfunded obligations                     (318)          (307) 
 Other post-employment liabilities                          (58)           (67) 
--------------------------------------------------  -----------   ------------ 
 
 Net asset/(liability)                                      330           (263) 
--------------------------------------------------  -----------   ------------ 
 
 Presented in consolidated statement of financial 
  position: 
 Liabilities                                             (1,424)        (1,672) 
 Assets                                                   1,754          1,409 
--------------------------------------------------  -----------   ------------ 
 
 Net asset/(liability)                                      330           (263) 
--------------------------------------------------  -----------   ------------ 
 
 
                                            30 September 
 Key actuarial assumptions                          2018    31 March 2018 
 Discount rate - UK past service              2.85%            2.60% 
 Discount rate - US                           4.25%            4.00% 
 Rate of increase in RPI - past service       3.25%            3.15% 
----------------------------------------  --------   ---  --------- --- 
 

The net pensions and other post-retirement benefit obligations position, as recorded under IAS19, at 30 September 2018 was an asset of GBP330m compared to a liability of GBP263m at 31 March 2018. The movement of GBP593m primarily reflects changes in actuarial assumptions resulting in a reduction in liabilities, asset performance being less than the discount rate, and employer contributions paid over the accounting period.

13. Pensions and other post-retirement benefit obligations (continued)

Changes in actuarial assumptions, primarily movements in discount rates, led to a reduction in liabilities of GBP703m (a decrease in UK and US liabilities of GBP359m and GBP344m respectively) which reflected increases in corporate bond yields in both the UK and US. A loss of GBP135m reflects returns on assets, primarily in the UK, being less than the discount rate. The net impact of actuarial gains and losses has been reflected within the consolidated statement of comprehensive income. Employer contributions of GBP242m were paid over the accounting period.

The pension surpluses in both the UK in relation to the National Grid UK Pension Scheme of GBP1,277m (31 March 2018: GBP1,105m) and the National Grid Electricity Group of the Electricity Supply Scheme of GBP209m (31 March 2018: GBP73m) and the Niagara Mohawk Plan in the US of GBP268m (31 March 2018: GBP231m) continue to be recognised as assets under IFRIC 14 as explained on page 146 of the Annual Report and Accounts.

The pension surplus at 30 September 2018 attributable to the UK pension plans do not reflect any accounting consequences that may be required as a result of guaranteed minimum pension equalisation. We will be considering the consequences of the recent Lloyds Banking Group judgement issued by the High Court in the coming months.

14. Commitments and contingencies

At 30 September 2018, there were commitments for future capital expenditure contracted but not provided for of GBP1,851m (2017: GBP2,148m).

We also have other commitments relating primarily to commodity purchase contracts, operating leases and contingencies in the form of certain guarantees and letters of credit. Other than the repayment of the Guaranteed Notes (described in note 18), these commitments and contingencies are described in further detail on page 157 of the Annual Report and Accounts.

In October 2018, the High Court handed down a judgement involving the Lloyds Banking Group's defined benefit pension schemes, concluding that the schemes should equalise benefits for men and women in relation to guaranteed minimum pension benefits. See note 13 above for further details.

Litigation and claims

Through the ordinary course of our operations, we are party to various litigation, claims and investigations. We do not expect the ultimate resolution of any of these proceedings to have a material adverse effect on our results of operations, cash flows or financial position.

15. Exchange rates

The consolidated results are affected by the exchange rates used to translate the results of our US operations and US dollar transactions. The US dollar to pound sterling exchange rates used were:

 
                                                   Year Ended 
                                                     31 March 
 30 September                          2018  2017        2018 
-------------------------------------  ----  ----  ---------- 
 
 Closing rate applied at period end    1.30  1.34        1.40 
 Average rate applied for the period   1.31  1.31        1.36 
-------------------------------------  ----  ----  ---------- 
 

16. Related party transactions

Related party transactions in the six months ended 30 September 2018 were substantially the same in nature to those disclosed on page 158 of the Annual Report and Accounts. We continue to treat Quadgas as a related party as we still own 39%. There were no related party transactions in the period that have materially affected the financial position or performance of the Group.

17. Transition to IFRS 9 and IFRS 15

The Group has adopted IFRS 9 and IFRS 15 prospectively, with effect from 1 April 2018. The impact of the transition on the opening consolidated statement of financial position are set out in the following table:

 
                                             31 March        Transition adjustments         1 April 
                                                 2018                                          2018 
                                        As previously                                   As restated 
 Impact of transition                        reported 
                                                              IFRS 9        IFRS 15 
                                                 GBPm           GBPm           GBPm            GBPm 
------------------------------------   --------------  -------------  -------------  -------------- 
 
 Non-current assets 
 Goodwill                                      5,444        -              -               5,444 
 Other intangible assets                         899        -              -                 899 
 Property, plant and equipment                39,853        -              -              39,853 
 Other non-current assets                        115        -              -                 115 
 Pension assets                                1,409        -              -               1,409 
 Financial and other investments                 899        -  (1)         -                 899 
 Investments in joint ventures 
  and associates                               2,168        -              -               2,168 
 Derivative financial assets                   1,319        -              -               1,319 
 Total non-current assets                     52,106        -              -              52,106 
-------------------------------------  -------------   ------  -----  ------  -----  ----------- 
 
 Current assets 
 Inventories and current 
  intangible assets                              341        -              -                 341 
 Trade and other receivables                   2,798        -  (2)        (3)              2,795 
 Current tax assets                              114        -              2                 116 
 Financial and other investments               2,694        -  (1)         -               2,694 
 Derivative financial assets                     405        -              -                 405 
 Cash and cash equivalents                       329        -              -                 329 
-------------------------------------  -------------   ------  -----  ------  -----  ----------- 
 Total current assets                          6,681        -             (1)              6,680 
-------------------------------------  -------------   ------  -----  ------   ----  ----------- 
 
 Total assets                                 58,787        -             (1)             58,786 
-------------------------------------  -------------   ------  -----  ------   ----  ----------- 
 
 Current liabilities 
 Borrowings                                   (4,447)       -              -              (4,447) 
 Derivative financial liabilities               (401)       -              -                (401) 
 Trade and other payables                     (3,453)       -             27  (7)         (3,426) 
 Contract liabilities                              -        -           (21)  (7)            (21) 
 Current tax liabilities                        (123)       -              -                (123) 
 Provisions                                     (273)       -              -                (273) 
 Total current liabilities                    (8,697)       -              6              (8,691) 
-------------------------------------  -------------   ------  -----  ------  -----  ----------- 
 
 Non-current liabilities 
 Borrowings                                  (22,178)     (32  )(3)        -             (22,210) 
 Derivative financial liabilities               (660)       -              -                (660) 
 Other non-current liabilities                (1,317)       -            530  (7)           (787) 
 Contract liabilities                              -        -          (776)  (7)           (776) 
 Deferred tax liabilities                     (3,636)       5  (4)        72  (8)         (3,559) 
 Pensions and other post-retirement 
  benefit obligations                         (1,672)       -              -              (1,672) 
 Provisions                                   (1,779)       -              -              (1,779) 
 Total non-current liabilities               (31,242)     (27)          (174)            (31,443) 
-------------------------------------  -------------   ------   ----  ------   ----  ----------- 
 
 Total liabilities                           (39,939)     (27)          (168)            (40,134) 
-------------------------------------  -------------   ------   ----  ------   ----  ----------- 
 
 Net assets                                   18,848      (27)          (169)             18,652 
-------------------------------------  -------------   ------   ----  ------   ----  ----------- 
 
 Equity 
 Share capital                                   452        -              -                 452 
 Share premium account                         1,321        -              -               1,321 
 Retained earnings                            21,599     (99)  (5)      (169  )(9)        21,331 
 Other equity reserves                        (4,540)      72  (6)         -              (4,468) 
-------------------------------------  -------------   ------  -----  ------  -----  ----------- 
 Total shareholders' equity                   18,832      (27)          (169)             18,636 
 Non-controlling interests                        16        -              -                  16 
-------------------------------------  -------------   ------  -----  ------  -----  ----------- 
 
 Total equity                                 18,848      (27)          (169)             18,652 
-------------------------------------  -------------   ------   ----  ------   ----  ----------- 
 

17. Transition to IFRS 9 and IFRS 15 (continued)

Both standards were applied using the modified retrospective approach whereby comparative amounts have not been restated but a cumulative adjustment has been made to retained earnings in the 1 April 2018 opening consolidated statement of financial position.

IFRS 9: Financial Instruments

IFRS 9 has changed the accounting for the classification and measurement of financial instruments, impairment of financial assets, and hedge accounting. A summary of the accounting changes was provided in the Annual Report and Accounts for the year ended 31 March 2018 and the details are set out below.

Adjustments arising as a result of the transition to IFRS 9:

1. The available-for-sale category has been replaced with investments held at fair value through profit and loss and investments held at fair value through other comprehensive income. The changes to the classification and measurement of financial assets have not altered the carrying value of any financial assets held by the Group.

The Group has reclassified its investments based on their contractual cash flows and the business model they are held under. The insurance company fund investments and Group investments in money market funds were reclassified from available-for-sale to fair value through profit and loss as their contractual cash flows are not solely payments of principal and interest. Other investments were reclassified to fair value through other comprehensive income as they are held both to collect contractual cash flows and to sell them. The net impact to retained earnings of the reclassification on transition was an GBP8m gain.

2. The change from the incurred loss impairment model of IAS 39 to the expected loss model in IFRS 9 has not had a material impact on the Group's credit loss provision. The Group calculates its impairment provision on trade receivables using a sophisticated provisions matrix. The inclusion of forward looking information has not had a significant impact on the matrix as the relevant short-term future economic conditions affecting our retail customers are expected to be similar to recent experience.

3. The Group elected to reclassify an existing liability with a carrying value of GBP570m from amortised cost to fair value through profit and loss to reduce a measurement mismatch. At transition, the resultant impacts include an increase in the carrying value of the liability of GBP32m, a reduction in retained earnings of GBP40m and the establishment of an own credit reserve (within Other equity reserves) of GBP7m.

4. Deferred tax is recognised on the adjustments recorded on the transition to IFRS 9. Reserve impacts are stated net of related deferred tax.

   5.   Retained earnings includes the impact from the changes to adjustments 1, 3 and 6. 

6. The Group has adopted the hedge accounting requirements of IFRS 9 which more closely align with the Group's risk management policies. On transition, it was concluded that all IAS 39 hedge relationships are qualifying IFRS 9 relationships with the treatment of the cost of hedging being the main change. The effect was a reclassification in reserves of a GBP67m gain from retained earnings and a GBP10m gain from the cash flow hedge reserve, into a new cost of hedging reserve (within Other equity reserves). In this reserve, qualifying unrealised gains and losses excluded from hedging relationships are deferred and released systematically into profit or loss to match the timing of hedged items.

17. Transition to IFRS 9 and IFRS 15 (continued)

IFRS 15: Revenue from Contracts with Customers

IFRS 15 has primarily changed the accounting for our connection and diversion revenues in our regulated businesses.

The accounting for revenue under IFRS 15 does not represent a substantive change from the Group's previous practice under IAS 18 for recognising revenue from sales to customers with the exception of the following items:

-- Certain pass-through revenues (principally revenues collected on behalf of the Scottish and Offshore transmission operators) will be recorded net of operating costs, whereas previously they were recognised gross of operating costs. Had we not adopted IFRS 15, our revenues and operating costs for the six months ended 30 September 2018 would have been GBP570m higher, with no impact to operating profits.

-- Contributions for capital works relating to connections for our customers are now deferred as contract liabilities on our consolidated statement of financial position and released over the life of the connection asset. This is a change for our US Regulated business and our UK Gas Transmission business, where previously revenues were recorded once the work was completed. Had we not adopted IFRS 15, our revenues and operating profit for the six months ended 30 September 2018 would have been GBP23m higher.

-- In the UK, contributions for capital works relating to diversions are now recognised as the works are completed. This is a change for the UK regulated businesses where revenues were previously deferred over the life of the asset. Had we not adopted IFRS 15, our revenues and operating profit for the six months ended 30 September 2018 would have been GBP6m lower.

Adjustments arising as a result of the transition to IFRS 15:

7. Deferred income from contributions for capital works have now been reclassified to contract liabilities. In addition, these liabilities for capital works relating to connections have increased as these capital contributions for connections are cumulatively adjusted for on 1 April 2018 and are now deferred and released over the life of the connection assets. This is a change for our US Regulated business and our UK Gas Transmission business where previously revenues were recorded once the work was completed.

Partially offsetting the increase in contract liabilities for connections is the change in accounting treatment for contributions relating to diversions in our UK businesses. These contributions are recognised as revenue as the works are completed where previously revenue was recognised over the life of the asset.

8. Deferred tax is recorded on the incremental amounts recorded against capital contributions and contract liabilities on the transition to IFRS 15. Deferred tax balances have been calculated at the rate substantially enacted at the balance sheet date.

   9.   The transition adjustment reflects the net of the above. 

18. Additional disclosures in respect of guaranteed securities

On 1 June 2018, the Group repaid the 6.625% Guaranteed Notes due 2018 that were issued in June 1998 by British Transco Finance Inc., then known as British Gas Finance Inc. (issuer of notes). As a result, at 30 September 2018, the only debt issuances (including preferred shares) that are listed on a US national securities exchange and are guaranteed by other companies in the Group are Niagara Mohawk Power Corporation's 3.6% and 3.9% issued preferred shares, which amount to GBP29m. National Grid plc provided a guarantee, dated 29 October 2007 for these preferred shares. National Grid plc's guarantee of Niagara Mohawk Power Corporation's preferred shares is full and unconditional pursuant to Rule 3-10(i)(8) (i) and (ii) of Regulation S-X. These guarantors commit to honour any liabilities should the company issuing the debt have any financial difficulties.

In order to provide debt holders with information on the financial stability of the companies providing the guarantees, we are required to disclose individual financial information for these companies. Summary statements of comprehensive income and summary cash flow statements are presented, on a consolidated basis, for the period ended 30 September 2018, with comparatives also provided on the same basis. Summary statements of comprehensive income and summary cash flow statements of National Grid plc are presented under IFRS measurement principles, as modified by the inclusion of the results of subsidiary undertakings on the basis of equity accounting principles.

The summary statements of financial position of National Grid plc include the investments in subsidiaries recorded on the basis of equity accounting principles for the purposes of presenting condensed consolidating financial information under IFRS. The summary statements of financial position present these investments within non-current financial and other investments.

The consolidation adjustments column includes the necessary amounts to eliminate the intercompany balances and transactions between National Grid plc, Niagara Mohawk Power Corporation and other subsidiaries.

Summary statements of comprehensive income for the six months ended 30 September 2018:

 
                                     Parent                Issuer 
                                  guarantor             of Shares 
                                -----------  -------------------- 
                                                           Niagra                                         National 
                                   National                Mohawk          Other    Consolidation             Grid 
                                   Grid plc     Power Corporation   subsidiaries      adjustments     consolidated 
                                       GBPm                  GBPm           GBPm             GBPm             GBPm 
------------------------------  -----------  --------------------  -------------  ---------------  --------------- 
 Continuing operations 
 Revenue                                 -             1,149              5,198             -             6,347 
 Operating costs                         -              (958)            (4,372)            -            (5,330) 
------------------------------  ----------   ---------------       ------------   -----------      ------------ 
 
 Total operating profit                  -               191                826             -             1,017 
 Net finance costs                    (109)              (58)              (353)            -              (520) 
 Interest in equity accounted 
  affiliates                           517                 -                (36)         (456)               25 
------------------------------  ----------   ---------------  ---  ------------   -----------      ------------ 
 
 Profit before tax                     408               133                437          (456)              522 
 Tax                                    22               (33)               (82)            -               (93) 
 
 Profit after tax from 
  continuing 
  operations                           430               100                355          (456)              429 
 Profit after tax from 
  discontinued 
  operations                             -                 -                  3             -                 3 
------------------------------  ----------   ---------------  ---  ------------   -----------      ------------ 
 
 Total profit for the period 
  (continuing and 
  discontinued)                        430               100                358          (456)              432 
 Amounts recognised in other 
  comprehensive income from 
  continuing operations(1)             899                79                416          (495)              899 
 Amounts recognised in other 
  comprehensive income from 
  discontinued operations(1)            36                 -                  -             -                36 
 
 Total comprehensive income 
  for the year                       1,365               179                774          (951)            1,367 
------------------------------  ----------   ---------------  ---  ------------   -----------      ------------ 
 Attributable to: 
  Equity shareholders                1,365               179                772          (951)            1,365 
  Non-controlling interests              -                 -                  2             -                 2 
------------------------------  ----------   ---------------  ---  ------------   -----------      ------------ 
 
                                     1,365               179                774          (951)            1,367 
------------------------------  ----------   ---------------  ---  ------------   -----------      ------------ 
 
   1.     Includes other comprehensive income relating to interest in equity accounted affiliates. 

18. Additional disclosures in respect of guaranteed securities (continued)

Summary statements of comprehensive income for the six months ended 30 September 2017:

 
                                       Parent                Issuer 
                                    guarantor             of Shares 
                                -------------  -------------------- 
                                                             Niagra                                       National 
                                     National                Mohawk          Other  Consolidation             Grid 
                                     Grid plc     Power Corporation   subsidiaries    adjustments     consolidated 
                                         GBPm                  GBPm           GBPm           GBPm             GBPm 
------------------------------  -------------  --------------------  -------------  -------------  --------------- 
 Continuing operations 
 Revenue                                -                1,153              5,531              -          6,684 
 Operating costs                        -                 (870)            (4,540)             -         (5,410) 
------------------------------  ---------      ---------------       ------------   ------------   ------------ 
 
 Total operating profit                 -                  283                991              -          1,274 
 Net finance income/(costs)            81                  (52)              (543)             -           (514) 
 Dividends receivable                 150                    -                  -           (150)             - 
 Interest in equity accounted 
  affiliates                          461                    -                  5           (446)            20 
------------------------------  ---------      ---------------  ---  ------------   ------------   ------------ 
 
 Profit before tax                    692                  231                453           (596)           780 
 Tax                                  (15)                 (87)               (51)             -           (153) 
------------------------------  ---------      ---------------       ------------   ------------   ------------ 
 
 Profit after tax from 
  continuing 
  operations                          677                  144                402           (596)           627 
 Profit after tax from 
  discontinued 
  operations                            -                    -                 50              -             50 
------------------------------  ---------      ---------------  ---  ------------   ------------   ------------ 
 
 Profit for the year                  677                  144                452           (596)           677 
 Amounts recognised in other 
  comprehensive income from 
  continuing operations(1)            255                    -                517           (517)           255 
 Amounts recognised in other 
  comprehensive income from 
  discontinued operations(1)           64                    -                  -              -             64 
                                ---------      ---------------  ---  ------------   ------------   ------------ 
 
 Total comprehensive income 
  for the year                        996                  144                969         (1,113)           996 
------------------------------  ---------      ---------------  ---  ------------   ------------   ------------ 
 Attributable to: 
  Equity shareholders                 996                  144                969         (1,113)           996 
  Non-controlling interests             -                    -                  -              -              - 
                                ---------      ---------------  ---  ------------   ------------   ------------ 
 
                                      996                  144                969         (1,113)           996 
------------------------------  ---------      ---------------  ---  ------------   ------------   ------------ 
 
   1.     Includes other comprehensive income relating to interest in equity accounted affiliates. 
 
 18. Additional disclosures in respect of guaranteed securities (continued) 
 Summary statements of financial 
  position as at 30 September            Parent       Issuer 
  2018:                                 guarantor    of shares 
                                      -----------  ------------ 
                                                         Niagra 
                                         National        Mohawk                                       National 
                                             Grid         Power          Other  Consolidation             Grid 
                                              plc   Corporation   subsidiaries    adjustments     consolidated 
                                             GBPm          GBPm           GBPm           GBPm             GBPm 
------------------------------------  -----------  ------------  -------------  -------------  --------------- 
 Non-current assets 
 Goodwill                                      -           743          5,117              -          5,860 
 Other intangible assets                       -             3            987              -            990 
 Property, plant and equipment                 -         6,769         35,892              -         42,661 
 Other non-current assets                      9             6             90             (9)            96 
 Amounts owed by subsidiary 
  undertakings                               352             -          2,109         (2,461)             - 
 Pension assets                                -           268          1,486              -          1,754 
 Financial and other investments          22,983            34          3,779        (25,513)         1,283 
 Derivative financial assets                   8             6          1,145              -          1,159 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Total non-current assets                 23,352         7,829         50,605        (27,983)        53,803 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Current assets 
 Inventories and current intangible 
  assets                                       -            61            379              -            440 
 Trade and other receivables                   -           574          1,761              -          2,335 
 Current tax assets                            -             -            298           (209)            89 
 Amounts owed by subsidiary 
  undertakings                            12,710            84         13,949        (26,743)             - 
 Financial and other investments             718             2            938              -          1,658 
 Derivative financial assets                 546            11             99           (467)           189 
 Cash and cash equivalents                    67             3             60              -            130 
 Assets held for sale                          -             -          2,121              -          2,121 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Total current assets                     14,041           735         19,605        (27,419)         6,962 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Total assets                             37,393         8,564         70,210        (55,402)        60,765 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Current liabilities 
 Borrowings                                 (832)         (625)        (2,677)             -         (4,134) 
 Derivative financial liabilities            (58)           (6)          (758)           467           (355) 
 Trade and other payables                    (64)         (323)        (2,757)             -         (3,144) 
 Contract liabilities                          -             -            (26)             -            (26) 
 Amounts owed to subsidiary 
  undertakings                           (14,000)          (36)       (12,707)        26,743              - 
 Current tax liabilities                       -          (217)          (129)           209           (137) 
 Provisions                                    -           (20)          (359)             -           (379) 
 Liabilities held for sale                     -             -            (50)             -            (50) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Total current liabilities               (14,954)       (1,227)       (19,463)        27,419         (8,225) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Non-current liabilities 
 Borrowings                                 (782)       (1,667)       (21,061)             -        (23,510) 
 Derivative financial liabilities           (232)           (6)          (542)             -           (780) 
 Other non-current liabilities                 -          (472)          (396)             -           (868) 
 Contract liabilities                          -             -           (834)             -           (834) 
 Amounts owed to subsidiary 
  undertakings                            (2,108)            -           (353)         2,461              - 
 Deferred tax liabilities                      -          (694)        (3,217)             9         (3,902) 
 Pensions and other post-retirement 
  benefit obligations                          -          (757)          (667)             -         (1,424) 
 Provisions                                    -          (280)        (1,607)             -         (1,887) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Total non-current liabilities            (3,122)       (3,876)       (28,677)         2,470        (33,205) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Total liabilities                       (18,076)       (5,103)       (48,140)        29,889        (41,430) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Net assets                               19,317         3,461         22,070        (25,513)        19,335 
 
 Equity 
 Share capital                               457           144            180           (324)           457 
 Share premium account                     1,316         2,362          9,032        (11,394)         1,316 
 Retained earnings                        21,587           954         12,732        (13,686)        21,587 
 Other equity reserves                    (4,043)            1            108           (109)        (4,043) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Shareholders' equity                     19,317         3,461         22,052        (25,513)        19,317 
 Non-controlling interests                     -             -             18              -             18 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Total equity                             19,317         3,461         22,070        (25,513)        19,335 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 

18. Additional disclosures in respect of guaranteed securities (continued)

Summary statements of financial position as at 31 March 2018:

 
                                         Parent       Issuer 
                                        guarantor    of shares 
                                      ----------- 
                                                         Niagra 
                                         National        Mohawk                                       National 
                                             Grid         Power          Other  Consolidation             Grid 
                                              plc   Corporation   subsidiaries    adjustments     consolidated 
                                             GBPm          GBPm           GBPm           GBPm             GBPm 
------------------------------------  -----------  ------------  -------------  -------------  --------------- 
 Non-current assets 
 Goodwill                                      -           691          4,753              -          5,444 
 Other intangible assets                       -             3            896              -            899 
 Property, plant and equipment                 -         6,148         33,705              -         39,853 
 Other non-current assets                      -             3            112              -            115 
 Amounts owed by subsidiary 
  undertakings                               350             -          2,092         (2,442)             - 
 Pension assets                                -           231          1,178              -          1,409 
 Financial and other investments          21,708            30          5,221        (23,892)         3,067 
 Derivative financial assets                  18             2          1,299              -          1,319 
 Total non-current assets                 22,076         7,108         49,256        (26,334)        52,106 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Current assets 
 Inventories and current intangible 
  assets                                       -            36            305              -            341 
 Trade and other receivables                   -           515          2,283              -          2,798 
 Current tax assets                            -             -            307           (193)           114 
 Amounts owed by subsidiary 
  undertakings                            11,253           130         11,777        (23,160)             - 
 Financial and other investments             939            15          1,740              -          2,694 
 Derivative financial assets                 308             7             46             44            405 
 Cash and cash equivalents                     -             4            325              -            329 
 Total current assets                     12,500           707         16,783        (23,309)         6,681 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Total assets                             34,576         7,815         66,039        (49,643)        58,787 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Current liabilities 
 Borrowings                                 (779)          (51)        (3,617)             -         (4,447) 
 Derivative financial liabilities           (187)          (36)          (134)           (44)          (401) 
 Trade and other payables                    (62)         (318)        (3,073)             -         (3,453) 
 Amounts owed to subsidiary 
  undertakings                           (11,810)            -        (11,350)        23,160              - 
 Current tax liabilities                       -          (202)          (114)           193           (123) 
 Provisions                                    -           (23)          (250)             -           (273) 
 Total current liabilities               (12,838)         (630)       (18,538)        23,309         (8,697) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Non-current liabilities 
 Borrowings                                 (773)       (2,087)       (19,318)             -        (22,178) 
 Derivative financial liabilities            (41)          (18)          (601)             -           (660) 
 Other non-current liabilities                 -          (281)        (1,036)             -         (1,317) 
 Amounts owed to subsidiary 
  undertakings                            (2,092)            -           (350)         2,442              - 
 Deferred tax liabilities                      -          (626)        (3,010)             -         (3,636) 
 Pensions and other post-retirement 
  benefit obligations                          -          (765)          (907)             -         (1,672) 
 Provisions                                    -          (248)        (1,531)             -         (1,779) 
 Total non-current liabilities            (2,906)       (4,025)       (26,753)         2,442        (31,242) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Total liabilities                       (15,744)       (4,655)       (45,291)        25,751        (39,939) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Net assets                               18,832         3,160         20,748        (23,892)        18,848 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Equity 
 Share capital                               452           133            180           (313)           452 
 Share premium account                     1,321         2,194          9,032        (11,226)         1,321 
 Retained earnings                        21,599           830         11,511        (12,341)        21,599 
 Other equity reserves                    (4,540)            3              9            (12)        (4,540) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Shareholders' equity                     18,832         3,160         20,732        (23,892)        18,832 
 Non-controlling interests                     -             -             16              -             16 
 Total equity                             18,832         3,160         20,748        (23,892)        18,848 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 

18. Additional disclosures in respect of guaranteed securities (continued)

Summary cash flow statements for the six month periods ended 30 September 2018 and 30 September 2017:

 
                                         Parent       Issuer 
                                        guarantor    of shares 
                                      ----------- 
                                                         Niagra 
                                         National        Mohawk                                       National 
                                             Grid         Power          Other  Consolidation             Grid 
                                              plc   Corporation   subsidiaries    adjustments     consolidated 
                                             GBPm          GBPm           GBPm           GBPm             GBPm 
------------------------------------  -----------  ------------  -------------  -------------  --------------- 
 Period ended 30 September 2018 
 Net cash flow from operating 
  activities - continuing operations           2           236          1,697              -          1,935 
 Net cash flow used in operating 
  activities - discontinued 
  operations                                   -             -           (47)              -           (47) 
 Net cash flow (used in)/from 
  investing activities - continuing 
  operations                               (265)         (171)          (545)            193          (788) 
 Net cash flow from investing 
  activities - discontinued 
  operations                                   -             -             78              -             78 
 Net cash flow from/(used in) 
  financing activities - continuing 
  operations                                 330          (65)        (1,452)          (193)        (1,380) 
 Net cash flow from financing 
 activities - discontinued 
 operations                                    -             -              -              -              - 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 
 Net increase/(decrease) in cash 
  and cash equivalents in the 
  period                                      67             -          (269)              -          (202) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 Period ended 30 September 2017 
 Net cash flow from operating 
  activities - continuing operations          24           328          1,716              -          2,068 
 Net cash flow used in operating 
  activities - discontinued 
  operations                                   -             -           (126)             -           (126) 
 Net cash flow from/(used in) 
  investing activities - continuing 
  operations                               3,193           155            596            280          4,224 
 Net cash flow from investing 
  activities - discontinued 
  operations                                   -             -             15              -             15 
 Net cash flow (used in)/from 
  financing activities - continuing 
  operations                              (4,303)         (482)        (1,984)          (280)        (7,049) 
 Net cash flow used in financing 
  activities - discontinued 
  operations                                   -             -           (231)             -           (231) 
 
 Net (decrease)/increase in cash 
  and cash equivalents in the 
  period                                  (1,086)            1            (14)             -         (1,099) 
------------------------------------  ----------   -----------   ------------   ------------   ------------ 
 

Principal risks and uncertainties

When preparing the half year financial information the risks as reported in the Annual Report and Accounts (principal risks on pages 19-21 and inherent risks on pages 193-196) were reviewed to ensure that the disclosures remained appropriate and adequate. No significant new risks were identified. Below is a summary of our key risks as at 30 September 2018:

   --     Catastrophic asset failure results in a significant safety and/or environmental event; 

-- Major cyber security breach of business, operational technology and/or critical national infrastructure systems/data;

-- Failure to predict and respond to a significant disruption of energy that adversely affects our customers and/or the public;

-- Failure to adequately identify, collect, use and keep private the physical and digital data required to support Company operations and future growth;

   --     Failure to influence future energy policy and secure satisfactory regulatory agreements; 

-- Failure to deliver our customer, stakeholder and investor proposition due to increased political and economic uncertainty;

-- Failure to adequately anticipate and minimise the adverse impact from disruptive forces such as technology and innovation on our business model; and

-- Failure to build sufficient capability and leadership capacity (including effective succession planning) required to deliver our vision and strategy.

The risks and uncertainties associated with the United Kingdom exiting the EU have been considered by the Board. The Board continues to monitor the potential impact of the referendum result on the future performance and position of the Group but does not currently believe there will be a material adverse impact on the Group's results or financial position in the current financial year.

Statement of Directors' Responsibilities

The half year financial information is the responsibility of, and has been approved by, the Directors. The Directors are responsible for preparing the half year financial information in accordance with the Disclosure and Transparency Rules (DTR) of the United Kingdom's Financial Conduct Authority.

The Directors confirm that to the best of their knowledge:

a) the condensed consolidated interim financial statements have been prepared in accordance with IAS 34 'Interim Financial Reporting' as issued by the International Accounting Standards Board and as adopted by the European Union;

b) the half year management report includes a fair review of the information required by DTR 4.2.7R (indication of important events during the first six months and description of principal risks and uncertainties for the remaining six months of the year); and

c) the half year management report includes a fair review of the information required by DTR 4.2.8R (disclosure of related parties' transactions and changes therein).

The Directors of National Grid plc are listed in the Annual Report and Accounts for the year ended 31 March 2018, with the exception of the changes in the period which are listed on page 7.

By order of the Board

   ..........................                                            .......................... 
   John Pettigrew                                                   Sir Peter Gershon 
   7 November 2018                                               7 November 2018 
   Chief Executive                                                  Chairman 

INDEPENT REVIEW REPORT TO NATIONAL GRID PLC

We have been engaged by the Company to review the condensed set of financial statements in the half-yearly financial report for the six months ended 30 September 2018 which comprises the consolidated income statement, the consolidated statement of comprehensive income, the consolidated statement of financial position, the consolidated statement of changes in equity, the consolidated cash flow statement and related notes 1 to 18. We have read the other information contained in the half-yearly financial report and considered whether it contains any apparent misstatements or material inconsistencies with the information in the condensed set of financial statements.

This report is made solely to the Company in accordance with International Standard on Review Engagements (UK and Ireland) 2410 "Review of Interim Financial Information Performed by the Independent Auditor of the Entity" issued by the Financial Reporting Council. Our work has been undertaken so that we might state to the Company those matters we are required to state to it in an independent review report and for no other purpose. To the fullest extent permitted by law, we do not accept or assume responsibility to anyone other than the Company, for our review work, for this report, or for the conclusions we have formed.

Directors' responsibilities

The half-yearly financial report is the responsibility of, and has been approved by, the Directors. The Directors are responsible for preparing the half-yearly financial report in accordance with the Disclosure Guidance and Transparency Rules of the United Kingdom's Financial Conduct Authority.

As disclosed in note 1, the annual financial statements of the Group are prepared in accordance with IFRSs as adopted by the European Union. The condensed set of financial statements included in this half-yearly financial report has been prepared in accordance with International Accounting Standard 34 "Interim Financial Reporting" as adopted by the European Union.

Our responsibility

Our responsibility is to express to the Company a conclusion on the condensed set of financial statements in the half-yearly financial report based on our review.

Scope of review

We conducted our review in accordance with International Standard on Review Engagements (UK and Ireland) 2410 "Review of Interim Financial Information Performed by the Independent Auditor of the Entity" issued by the Financial Reporting Council for use in the United Kingdom. A review of interim financial information consists of making inquiries, primarily of persons responsible for financial and accounting matters, and applying analytical and other review procedures. A review is substantially less in scope than an audit conducted in accordance with International Standards on Auditing (UK) and consequently does not enable us to obtain assurance that we would become aware of all significant matters that might be identified in an audit. Accordingly, we do not express an audit opinion.

Conclusion

Based on our review, nothing has come to our attention that causes us to believe that the condensed set of financial statements in the half-yearly financial report for the six months ended 30 September 2018 is not prepared, in all material respects, in accordance with International Accounting Standard 34 as adopted by the European Union and the Disclosure Guidance and Transparency Rules of the United Kingdom's Financial Conduct Authority.

Deloitte LLP

Statutory Auditor

London, United Kingdom

7 November 2018

Alternative performance measures/non-IFRS reconciliations

Within the Half Year Results Statement, a number of financial measures are presented. These measures have been categorised as alternative performance measures (APMs), as per the European Securities and Markets Authority (ESMA) guidelines and the Securities and Exchange Commission (SEC) conditions for use of non-IFRS Financial Measures.

An APM is a financial measure of historical or future financial performance, financial position, or cash flows, other than a financial measure defined under IFRS. The Group uses a range of these measures to provide a better understanding of its underlying performance. APMs are reconciled to the most directly comparable IFRS financial measure where practicable.

The Group has defined the following financial measures as APMs derived from IFRS within the Half Year Results Statement: net revenue, the various adjusted operating profit, earnings and earnings per share metrics detailed in the 'adjusted profit measures' section below and capital investment. For each of these we present a reconciliation to the most directly comparable IFRS measure.

Net revenue

'Net revenue' is revenue less pass-through costs, such as system balancing costs, and gas and electricity commodity costs in the US. Pass-through costs are fully recoverable from our customers and are recovered through separate charges that are designed to recover those costs with no profit. Any over- or under-recovery of these costs is returned to, or recovered from, our customers.

 
                                               2018                              2017 
-------------------------------  --------  --------  ----------- 
                                              Pass-                            Pass- 
                                    Gross   through                  Gross   through 
 Six months ended 30 September    revenue     costs  Net revenue   revenue     costs    Net revenue 
                                     GBPm      GBPm         GBPm      GBPm      GBPm           GBPm 
-------------------------------  --------  --------  -----------  --------  --------  ------------- 
 UK Electricity Transmission       1,574      (614)         960     2,076    (1,117)         959 
 UK Gas Transmission                 353      (104)         249       422      (123)         299 
 US Regulated                      4,053    (1,700)       2,353     3,799    (1,505)       2,294 
 NGV and Other                       387         -          387       407         -          407 
 Sales between segments              (20)        -          (20)      (20)        -          (20) 
-------------------------------  -------   -------   ----------   -------   -------   ---------- 
 Total                             6,347    (2,418)       3,929     6,684    (2,745)       3,939 
-------------------------------  -------   -------   ----------   -------   -------   ---------- 
 

Adjusted profit measures:

In considering the financial performance of our business and segments, we use various adjusted profit measures in order to aid comparability of results year on year. The various measures are presented on page 11 and reconciled below.

Adjusted results, also referred to as Headline results: These exclude the impact of exceptional items and remeasurements that are treated as discrete transactions under IFRS and can accordingly be classified as such. This is a measure used by management that forms part of the incentive target set annually for remunerating certain Executive Directors and further details of these items are included in note 4.

Underlying results: Further adapts our adjusted results to take account of volumetric and other revenue timing differences arising due to the in year difference between allowed and collected revenues, including revenue incentives, as governed by our rate plans in the US or regulatory price controls in the UK (but excluding totex-related allowances and adjustments). For the six months ended 30 September 2018, as highlighted on page 54, our underlying results exclude GBP64 million under-recovery in respect of timing differences, as well as storm costs where they are significant in a period where we expect to recover the bulk of the costs incurred through regulatory mechanisms in the US.

Constant currency: 'Constant Currency Basis' refers to the reporting of the actual results against the results for the same period last year which, in respect of any US dollar currency denominated activity, have been translated using the weighted average US dollar exchange rate for the six months ended 30 September 2018, which was $1.31 to GBP1.00. The weighted average rate for the six months ended 30 September 2017, was $1.31 to GBP1.00. Assets and liabilities as at 30 September 2018 have been retranslated at the closing rate at 30 September 2018 of $1.30 to GBP1.00. The closing rate for the balance sheet date 31 March 2018 was $1.40 to GBP1.00.

Alternative performance measures/non-IFRS reconciliations (continued)

Reconciliation of Statutory, Adjusted and Underlying Profits and Earnings - At actual exchange rates - Continuing operations

 
 Six months ended 30 September   Statutory           Exceptionals  Adjusted  Timing    Major    Underlying 
  2018                                         and remeasurements                     Storms 
                                      GBPm                   GBPm      GBPm    GBPm     GBPm          GBPm 
-------------------------------  ---------  ---------------------  --------  ------  -------  ------------ 
 UK Electricity Transmission          437                94            531      25         -        556 
 UK Gas Transmission                   46                33             79      12         -         91 
 US Regulated                         327                58            385      46         -        431 
 NG Ventures and Other                207                 -            207       -         -        207 
 Total operating profit             1,017               185          1,202      83         -      1,285 
 Net finance costs                   (520)               26           (494)      -         -       (494) 
 Share of post -tax results 
  of JVs and associates                25                 -             25       -         -         25 
-------------------------------  --------   ---------------  ----  -------   -----   -------  --------- 
 Profit before tax                    522               211            733      83         -        816 
 Tax                                  (93)              (41)          (134)    (19)        -       (153) 
-------------------------------  --------   ---------------   ---  -------   -----   -------  --------- 
 Profit after tax                     429               170            599      64         -        663 
-------------------------------  --------   ---------------  ----  -------   -----   -------  --------- 
 
 
 Six months ended 30 September   Statutory           Exceptionals  Adjusted  Timing    Major    Underlying 
  2017                                         and remeasurements                     Storms 
                                      GBPm                   GBPm      GBPm    GBPm     GBPm          GBPm 
-------------------------------  ---------  ---------------------  --------  ------  -------  ------------ 
 UK Electricity Transmission          542                 -            542      (2)        -        540 
 UK Gas Transmission                  126                 -            126      18         -        144 
 US Regulated                         448               (15)           433      93         -        526 
 NG Ventures and Other                158                 -            158       -         -        158 
 Total operating profit             1,274               (15)         1,259     109         -      1,368 
 Net finance costs                   (514)              (28)          (542)      -         -       (542) 
 Share of post -tax results 
  of JVs and associates                20                 -             20       -         -         20 
-------------------------------  --------   ---------------  ----  -------   -----   -------  --------- 
 Profit before tax                    780               (43)           737     109         -        846 
 Tax                                 (153)                4           (149)    (40)        -       (189) 
-------------------------------  --------   ---------------  ----  -------   -----   -------  --------- 
 Profit after tax                     627               (39)           588      69         -        657 
-------------------------------             ---------------   ---            ----- 
 

Reconciliation of Adjusted and Underlying Profits - At constant currency

 
                                                                     At constant currency 
                                  Adjusted       Constant   Adjusted  Timing    Major    Underlying 
                                 at actual       currency                      Storms 
Six months ended 30 September     exchange     adjustment 
 2017                                 rate 
                                      GBPm           GBPm       GBPm    GBPm     GBPm          GBPm 
                                ----------  ------------- 
UK Electricity Transmission           542          -            542      (2)        -        540 
UK Gas Transmission                   126          -            126      18         -        144 
US Regulated                          433         (3)           430      92         -        522 
NGV and Other                         158          -            158       -         -        158 
Total operating profit              1,259         (3)         1,256     108         -      1,364 
Net finance costs                    (542)         2           (540)       -        -       (540) 
Share of post -tax results 
 of JVs and associates                 20          -             20       -         -         20 
                                ---------   --------  ---  --------   -----   -------  --------- 
Profit before tax                     737         (1)           736     108         -        844 
                                ---------   -------- 
 

Alternative performance measures/non-IFRS reconciliations (continued)

Earnings per share calculations from continuing operations - At actual exchange rates

The table below reconciles the profit after tax from continuing operations per the previous tables back to the earnings per share from continuing operations for each of the adjusted profit measures. Earnings per share is only presented for those adjusted profit measures that are at actual exchange rates, and not for those at constant currency.

 
Six months ended 30 September       Profit    Non-controlling         Profit    Weighted      Earnings 
 2018                            after tax           interest      after tax     average     per share 
                                                                attributable      number 
                                                                      to the   of shares 
                                                                      parent 
                                      GBPm               GBPm           GBPm      Number         Pence 
                                ----------  -----------------  -------------  ---------- 
Statutory                              429          (1)                  428       3,367        12.7 
Adjusted (also referred to 
 as Headline)                          599          (1)                  598       3,367        17.8 
Underlying                             663          (1)                  662       3,367        19.7 
                                ----------  ----------   ----  -------------  ----------  ---------- 
 
 
Six months ended 30 September       Profit    Non-controlling         Profit    Weighted      Earnings 
 2017                            after tax           interest      after tax     average     per share 
                                                                attributable      number 
                                                                      to the   of shares 
                                                                      parent 
                                      GBPm               GBPm           GBPm      Number         Pence 
                                ----------  -----------------  -------------  ---------- 
Statutory                              627          (1)                  626       3,539        17.7 
Adjusted (also referred to 
 as Headline)                          588          (1)                  587       3,539        16.6 
Underlying                             657          (1)                  656       3,539        18.5 
                                ----------  ----------   ----  -------------  ----------  ---------- 
 

Timing impacts

Under the Group's regulatory frameworks, the majority of the revenues that National Grid is allowed to collect each year are governed by a regulatory price control or rate plan. If National Grid collects more than this allowed level of revenue, the balance must be returned to customers in subsequent years, and if it collects less than this level of revenue, it may recover the balance from customers in subsequent years. These variances between allowed and collected revenues give rise to "over and under-recoveries". A number of costs in the UK and the US are pass-through costs (including commodity and energy efficiency costs in the US), and are fully recoverable from customers. Timing differences between costs of this type being incurred and their recovery through revenues are also included in over and under-recoveries. In the UK, timing differences include an estimation of the difference between revenues earned under revenue incentive mechanisms and associated revenues collected. UK timing balances and movements exclude adjustments associated with changes to controllable cost (totex) allowances or adjustments under the totex incentive mechanism. Opening balances of over and under-recoveries have been restated where appropriate to correspond with regulatory filings and calculations.

 
                                      UK Electricity    UK Gas Transmission    US Regulated(1)    Total(2) 
                                        Transmission 
                                                GBPm                   GBPm               GBPm        GBPm 
31 March 2018 closing balance               (44)                   93                 246           295 
Opening balance adjustments                  (6)                    9                  (6)           (3) 
                                                                       ---- 
Restated 1 April 2018 opening 
 balance                                    (50)                  102                 240           292 
Under-recovery                              (25)                  (12)                (46)          (83) 
                                                                        --- 
30 September 2018 closing balance 
 to (recover)/return                        (75)                   90                 194           209 
                                                                       ----                --- 
 
                                      UK Electricity    UK Gas Transmission    US Regulated(1)    Total(2) 
                                        Transmission 
                                                GBPm                   GBPm               GBPm        GBPm 
31 March 2017 closing balance               (30)                  112                 323           405 
Opening balance adjustments                  (9)                   (2)                  9            (2) 
                                                                        ---                --- 
Restated 1 April 2017 opening 
 balance                                    (39)                  110                 332           403 
Over/(under)-recovery                         2                   (18)                (92)         (108) 
                                                 ---                    --- 
30 September 2017 closing balance 
 to (recover)/return                        (37)                   92                 240           295 
                                                                       ----                --- 
Year on year timing variance                (27)                    6                  46            25 
                                                                       ----                --- 
 

1. US Regulated balances have been restated using the average rate of 1.31 for the period to 30 September 2018.

2. The closing balances as at 30 September 2017 and 30 September 2018 would have been GBP290m and GBP211m respectively had the closing exchange rates been used.

Alternative performance measures/non-IFRS reconciliations (continued)

Capital investment

'Capital investment' or 'investment' refers to additions to plant, property and equipment and intangible assets, and contributions to joint ventures and associates, other than the St William Homes LLP joint venture. We also include the Group's investments in Technology and Innovation companies during the period (which are classified for IFRS purposes as non-current financial assets on the Group consolidated statement of financial position).

Investments made to our St William Homes LLP arrangement are excluded based on the nature of this joint venture arrangement. We typically contribute property assets to the joint venture in exchange for cash and accordingly do not consider these transactions to be in the nature of capital investment.

 
                                    At actual exchange 
                                           rates                  At constant currency 
Six months ended 30 September      2018    2017    % change      2018     2017    % change 
                                   GBPm    GBPm                  GBPm     GBPm 
------------------------------           ------  ----------  --------  -------  ---------- 
 UK Electricity Transmission        462     515    (10)%          462      515     (10)% 
 UK Gas Transmission                153     157     (3)%          153      157      (3)% 
 US Regulated                     1,177   1,095      7%         1,177    1,089       8% 
 NGV and Other                      338     233     45%           338      233      45% 
Group capital investment          2,130   2,000      7%         2,130    1,994       7% 
 
 
Six months ended 30 September                         2018   2017    % change 
                                                      GBPm   GBPm 
Capital expenditure                                  2,040  1,892      8% 
Equity investment, funding contributions and loans 
 to joint ventures and associates                       76    108    (30)% 
Investment in financial assets (Technology and 
 Innovation)                                            14      -         N/A 
 
Group capital investment                             2,130  2,000      7% 
 
 

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