Sue Lawley's castaway this week has been the voice of racing for half a century. Due to retire in November 1997, Peter O'Sullevan calculates that he has commentated on some 14,000 races.

After calling his last Grand National earlier this year he perhaps breathed a sigh of relief, because even after 50 broadcasts he admits to still finding the responsibility nerve-wracking. Horses have always been his life. He owns them, bets on them, writes about them and campaigns for their welfare, with the same enthusiasm that he had as a young boy riding with his grandparents' groom, Truelove.

[Taken from the original programme material for this archive edition of Desert Island Discs]

Favourite track: Piano Concerto 5 in E Flat Major by Ludwig van Beethoven