Art forgery is usually a dangerous business, but Christophe Petyt has turned it into a wildly profitable business. “At 32, he is the world’s leading dealer in fake masterpieces, a man whose activities provoke both admiration and exasperation in the higher levels of the art world. Name the painting and for as little as £1,000 he will deliver you a copy so perfect that even the original artist would struggle to tell the difference.”