Radio 2 presenter, Newsnight journalist, Eggheads host…and now novelist. The Diver and the Lover is inspired by Salvador Dali’s painting Christ of St John of the Cross. Set in post-civil-war Catalonia and based on the real events the book is a tantalising cocktail of love, sacrifice and Dali as it follows two English sisters. One of our leading broadcasters reflects on his career and writing. In conversation with journalist Mark Palmer.