Rasoum tops trophy field A maximum field of 23 will line-up for the Stg£60,000 William Hill Trophy at York tomorrow.Ed Dunlop`s Rasoum will shoulder top weight of 9st 7lb and Pat Eddery takes the ride.Mick Channon and Craig Williams, the trainer and jockey responsible for last year`s winner Cotton House, are responsible for Nasmatt this time.The Danehill filly, a half-sister to the ill-fated Bint Allayl, was placed in two Listed races last season.Nasmatt was fourth on her seasonal debut at Newmarket and Channon has declared himself satisfied with the filly`s progress since her reappearance.Ante-post favourite Polar Kingdom is drawn 22, while Kieren Fallon`s mount Orientor races from the next stall in 23, which is under the stands` side.The six-furlong handicap is the feature event of the 31st Timeform Charity Day which has raised more than Stg£2.7million since its inauguration in 1971.