Corum gamble leaves Gosdem mystified

John Gosden is at a loss to explain the recent Vodafone Derby gamble on his once-raced maiden Corum, who has been backed into 50-1.

The Galileo colt finished 10th of 13 on his only outing to date at Newmarket last October but, according to Gosden, he has yet to do any serious work this year.