By Carla Mozee, MarketWatch

LONDON (MarketWatch) -- Stocks in the U.K. slipped Tuesday, with SABMiller shares giving back some of the gains they made in the previous session.

The benchmark FTSE 100 index was down 0.2% at 6,792.174. The index finished down 0.1% on Monday on market uncertainty about whether Scotland will vote to break away from the U.K.

On Tuesday, SABMiller PLC (SBMRY) fell 2.1%, weighing down the FTSE 100. The shares on Monday leapt 8.7% on news that Anheuser-Busch InBev NV (AHBIY) was talking to banks about financing a deal to buy the London-listed brewer.

Also moving lower were shares of chip designer ARM Holdings , down by 2.4%.

Investors will watch for U.K. inflation data for August, due at 9:30 a.m. in London, to discover whether it's holding near the Bank of England's comfort zone of around 2%. Inflation is likely to come in at 1.5% on a year-over-year basis, according to estimates. In July, inflation fell to 1.6%, and consumer prices were down 0.3% from June.

The pound (GBPUSD) was buying $1.6183, compared with $1.6231 late Monday.

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