By Jon Lees Willie Mullins has been backed to become champion jumps trainer – in Britain. The sport’s dominant trainer is the holder of 17 training titles in his native Ireland. But thanks to another prolific Cheltenham Festival at which he saddled nine winners to pass 100 winners at the fixture, he is in the running for the British jumps trainers’ championship as well. Mullins is in third place in the table, determined by prize-money, with £1.9 million in earnings, behind leader Dan Skelton who is less than £18,000 ahead of defending champion Paul Nicholls, the 14-time winner, on £2.5m. The t…