There have been 28 runnings of the G1 Weatherbys Champion Bumper at Cheltenham and 10 of them have been won by Willie Mullins. The Festival's most successful trainer of all time even rode the first of his winners, Wither Or Which (Ire), and he trains five of the 15 declared runners for this year's race, which is the final contest of Wednesday's card. Of that quintet, the Cheveley Park Stud-owned favourite Sir Gerhard (Ire) (Jeremy) cost £400,000. Lower down the sales scale is the little mare Grangee (Fr) (Great Pretender...