Kirsty Young asks the author Irvine Welsh what advice he would give his younger self.
Welsh became a literary sensation when his first novel, Trainspotting, was published in 1993. The film adaptation that followed made him a star. But before that he'd gone from being a punk in London to a turn into administrative work for his local council, via a brush with heroin addiction. He looks back at his childhood in Edinburgh, his parents' romance and a first arrest at just eight years old.
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