Aidan O'Brien has seven horses in first nine of ante-post betting for Derby . The trainer is also looking to add a second horse to his stable after the death of his son Aidan.
Aidan O'Brien has seven horses in first nine of ante-post betting for Derby . Jockeys William Buick and James Doyle have been recruited by Godolphin . Ryan Moore and Richard Hughes set for Jockeys Championship battle .