UK trading software firm Fidessa, whose tech is woven through the trading desks of many banks and investment managers, will find out within 10 days whether its mooted £1.4bn takeover will go unchallenged.

The UK's Takeover Panel has given Ion Investment Group and SS&C Technologies, a fintech consolidator and a rival software group which have both expressed interest in Fidessa, a hard deadline for making serious rival bids.