James Naughtie has been speaking to Irvine Welsh about his new novel: The Blade Artist. From the drugs and violence of Trainspotting, his new novel The Blade Artist, which sees the return of Francis Begbie, the psychopath villain of trainspotting , who's become a respectful artist in California, but it turns out, he hasn't changed at all. (Image: Irvine Welsh Credit:BBC/George Cathro)