Patrick Degorce, who helped start up activist hedge fund manager The Children's Investment Fund Management with founder Christopher Hohn and whose letter to ABN Amro sparked Europe's biggest banking takeover, has left the company.

Degorce resigned last week, according to a filing just published at Companies House. A source close to the company said his responsibility as manager of TCI's global banks fund had been taken over by John Sheridan, who joined TCI just under a year ago from Deutsche Bank.