Ian Rankin, Britain's bestselling crime writer, spends a day with Jack Vettriano, Scotland's most successful painter. Both men grew up in the shadow of Fife's collieries and now enjoy an international reputation and considerable wealth. Rankin's books have been translated into 22 languages and Vettriano sells more prints than Monet or Van Gogh. Starting in Vettriano's home in Kirkcaldy and ending up in Edinburgh, Artworks Scotland brought the two friends together to talk about success, snobbery and sex.