Flat jockey Spencer claims Cheltenham success Jamie Spencer, one of the brightest young stars on the Flat scene, added a rather unusual string to his bow when landing the Weatherbys Champion Bumper aboard Pizarro at Cheltenham today.Spencer emerged on top from a fantastic duel between himself and Norman Williamson, aboard hot favourite Rhinestone Cowboy (5-2), to give Ireland yet another win in the contest.'This is very special because my father George won the Champion Hurdle here 39 years ago with Winning Fair,' said Spencer.'I begged Mr O`Grady for the ride and this is a smashing horse which has won on merit and I`m very relieved we kept the prize.'The race developed into a three-way fight turning into the straight with Back In Front just heading the trio.He couldn`t find any more, however, two furlongs out and the three soon became two. Pizarro (14-1) and Rhinestone Cowboy went at it hammer and tongs and at one point it looked as though Williamson`s horse would prevail. But Spencer gathered his mount up and pushed him out hands and heels close home to come out on top by a neck.Back In Front (12-1) finished three-and-a-half-lengths behind the pair to give trainer Edward O`Grady the first and third.