By rights, Irvine Welsh ought to be photographed somewhere gritty, looking grumpy, he says: “That’s the brand.” Beside a graffitied wall or at the docks, with a beanie pulled low, and definitely not smiling. But here he is, clear-skinned and wholesome in shorts and a T-shirt, drinking tea and – it’s hard to think of anything more off-brand – talking about the health benefits of yoga. Given his reputation for having lived in the worlds his books portray, he should or could look a lot worse. He guffaws at this, eyes a delighted blue, and repeats the phrase as if he’s found a new personal tagline: “Could look a lot worse!”
Over the three decades since his cult debut, Trainspotting, was published in 1993, Welsh’s fiction has explored with humour the darker side of life. Drugs, clubs, alcohol, violence … often alongside psychological or social deprivation. Despite being 17 novels and four short-story collections into his career, selling more than 6m books globally, he remains best known for his first. It achieved, he says, “what most writers want to achieve in a lifetime – the big zeitgeist book that goes into the culture”.