jonwig, historically idn have had a significant better 2nd half; not that there's a lot to go by! i'd expect this trend to slow down a little but on that basis 426k in the 1st half could see idn easily achieve £1m profit for the year. they may need £17m-£18m sales to achieve it though which i'm a tad unsure about.
also, £1m profit is a major milestone for the company and i'd expect the ceo to push the business a little more towards the end of their financial year if it was in sight.
whether or not they would inform the market is a different story (!) although i'd settle for £989k! perhaps they'll notify us when they issue notice of results which is a lot more than most aim companies!