In January 1942, the BBC broadcast the first edition of its longest-running radio programme: Desert Island Discs. The idea was simple: persuade a well-known person to imagine they were marooned on a desert island and ask them which eight records they would like to take with them. Simon Watts introduces highlights from over 3,000 interviews with film stars, musicians and public figures.PHOTO: Long-time Desert Island Discs presenter Roy Plomley (BBC)