The Diamond Jubilee Stakes, contested on the final day of the Royal meeting, is a Group 1 race over 6 furlongs open to horses aged four years or older. The event was established in 1868, and it was originally called the All-Aged Stakes, but later it was renamed the Cork and Orrery Stakes in 1926, in honour of the 9th Earl of Cork, Richard Edmund St Lawrence Boyle, who served as Master of the Buckhounds between January and July 1866 in Lord John Russell's time in office, and again in 1868-1874 and 1880-1885 during William Gladstone's period in office. The present system of race grading was introduced in 1971, and the Cork and Orrery Stakes was initially classed at Group 3 level, but it was promoted to Group 2 status in 1998. The race was renamed to commemorate the Golden Jubilee of Elizabeth II in 2002, while in 2012 the race was given its current name, Diamond Jubilee Stakes, to commemorate the Diamond Jubilee of Queen Elizabeth II.
Early history:- The inaugural running of the All-Aged Stakes, the forerunner of the Diamond Jubilee Stakes, was over the New Mile and took place on Thursday 11th June 1868 when Mr G Bryan's Lanaret (6/4 fav) defeated Martyr (3/1), Vespasian (10/1) and 5 others by a length and a half and 10 lengths.