Bookies Running Scared Of Derby Favourite Bookmakers expect Authorized to go off as 'one of the best-backed' horses in Derby history when he contests the Vodafone-sponsored showpiece at Epsom on Saturday week.The confirmation Frankie Dettori will maintain his unbeaten partnership with the Peter Chapple-Hyam-trained Dante winner has set the alarm bells ringing with the layers.He currently trades at 11-10 with Coral and the Barking-based firm believe he could start at odds-on come the big day.Spokesman David Stevens said: 'His wins in the Racing Post Trophy and Dante mean this colt´s Derby credentials are rock-solid.'The huge public support for Frankie Dettori will ensure Authorized is sent off as one of the best-backed favourites in Derby history.'(C) PA Sport