Paul Smith: designer of boundless energy who can't sit still for long

Despite producing 28 collections a year 'to pay the rent' he still finds time to work on bicycles and snowboards, cameras and rugs Paul Smith won't sit still. He's at his desk, behind mountains of knick-knacks, squirming on his seat like a hyperactive schoolboy. "I've got this busy mind," he says, wriggling around on the z-shaped leather chair. "It's just so jammed with stuff, there's no space or time left any more." He is surrounded by a wunderkammer of bits and bobs, piles of clocks and globes...