Richard Evans, the London-based European head of electronic trading at Citigroup and a founder of trading system Turquoise, has left after 10 years with the US bank.

Evans left Citigroup, where he had European responsibility for its electronic execution services, yesterday, just 10 days after Citigroup announced it was cutting 50,000 jobs and two days after the US Government agreed to inject an additional $20bn (€15.9bn) into the troubled bank.