David Cameron revealed that the London Mayor had seen him as a rival . PM said JohnsonMr Johnson ' 'suddenly realised ' his competition was elsewhere . Comes after he named Mr Johnson ' , Osborne and May as potential successors . Mr Cameron also admitted Bullingdon Club past 'cripplingly embarrassing '
David Cameron revealed that the London Mayor had seen him as a rival . PM said Mr Johnson 'suddenly realised ' his competition was elsewhere . Comes after he named Johnson , Osborne and May as potential successors . Mr Cameron also admitted Bullingdon Club past 'cripplingly embarrassing '