The London chief of the joint asset management venture between Crédit Agricole and Société Générale has left to run his own investment company, less than 18 months after the decision to merge the two groups. Two other senior members of the UK office have also left.

Bruno Crastes stood down as chief executive of Amundi's London office today, along with his deputy, Jean Noel Alba, and head of global fixed income, Vincent Chailley, a spokeswoman from the company confirmed.