Hedge fund billionaire Sir Christopher Hohn is preparing for victory in his bitter battle with the London Stock Exchange this week as sources say a crucial document outlining reasons for chief executive Xavier Rolet’s exit will not identify any wrongdoing. The Children’s Investment Fund, Sir Christopher’s hedge fund which owns 5pc of the exchange, is growing increasingly confident that it will succeed in its campaign to keep Mr Rolet in the top job and force chairman Donald Brydon out.