By Melissa Jones Ambiente Friendly was slashed to 8-1 for Epsom after he trounced his field in Lingfield’s William Hill Derby Trial. The previously unconsidered Classic colt had jockey Callum Shepherd looking behind him for dangers on the run-in. But there were none as James Fanshawe’s exciting young prospect quickened away from 6-4 favourite Illinois. Bookmakers scrambled to cut the four-and-a-half length winner’s odds from a huge pre-race high of 100-1. And Shepherd, who has never had a Derby ride, was surprised to find a genuine contender for the main event on June 1. “I couldn’t have expec…