Irish trainer Dermot Weld won the Investec Derby for the first time courtesy of Harzand.
The winner, a son of the 2009 Investec Derby winner Sea The Stars, became another breeding triumph for his owner, HH The Aga Khan, who has now won the World's greatest Flat race no fewer than five times, equalling the record of his grandfather. Harzand did not have the smoothest path to the race, having suffered a sore foot caused by a shoeing problem that drew blood but it was treated and it did not stop the colt when it mattered.
Harzand, ridden by Pat Smullen, started at 13-2 and beat the 7-2 favourite US Army Ranger by one and a half lengths. In third was 14-1 shot Idaho, who was another length and a quarter behind the runner-up.
Smullen and Weld were handed the Derby trophy by The Queen, who presented the prize for the first time in her 90th birthday year.
Prior to the race there was a minute's applause following the death of boxing legend Muhammad Ali.