The 2012 Epsom Derby (known as the Investec Derby for sponsorship reasons) was the 233rd annual running of the Derby horse race. It took place at Epsom Downs Racecourse on 2 June 2012.The race was won by Camelot, the 8/13 favourite ridden by jockey Joseph O'Brien and trained by his father Aidan O'Brien.As usual, in attendance at Epsom was Queen Elizabeth II to mark the start of a national holiday weekend celebrating her Diamond Jubilee.