Peregrine Andrew Morny Cavendish, 12th Duke of Devonshire, KCVO, CBE (born 27 April 1944), is a British peer. He is the only surviving son of the 11th Duke of Devonshire and his wife, the former Deborah Mitford. He succeeded to the dukedom following the death of his father on 3 May 2004. Prior to this succession, he was styled Marquess of Hartington.He attended Eton College and Exeter College, Oxford, where he read History.The Duke is well known in the world of horse racing and serves as Her Majesty's Representative at Ascot and chairman of Ascot Racecourse Ltd. In 1980 he was elected to the Jockey Club and in 1989 he was appointed its Senior Steward (that is, Chairman). During his five-year term of office, he oversaw a number of changes within the racing industry, in particular the creation of the British Horseracing Board which is now the governing authority for British racing.