‘Work hard – nobody cares how good you used to be’: Paul Smith at 80 on love, fun and his fabulous life in fashion

With the release of his new biography, the British designer talks about leaving school at 15, the real reason he won’t retire and why no one wears velvet trousers any more Go for a browse in the Paul Smith shop in Mayfair, London, on any given Saturday and you’ll likely find an older shop assistant, straight-backed in fine tailoring, approaching to help you with a new shirt, or a suit for a special occasion, perhaps a jaunty pair of socks. There aren’t many global fashion brands, Paul Smith points out, perhaps unnecessarily, “where the owner is a Saturday boy”.

But working in his shop, one of more than 130 around the world, is probably Smith’s favourite part of the job. “It’s fantastic, you meet so many interesting people,” he says, smiling broadly. Smith’s whole career, he says, has always been about doing things in a different way. He’s the untrained fashion designer who created a global British brand, who put a bright lining or some stripes into classic tailoring, and who has turned down multiple substantial offers to buy his company, in order to remain in control. Sir Paul Smith has just turned 80 – and he has the enviable energy of someone less than half his age, swimming…