Art crime is flourishing. “It is an area of crime that costs insurers £500m a year. The database Invaluable, a London private company, lists more than 100,000 stolen art and antique works. Among them, I discovered 26 Renoirs; eight Warhols unstrapped in transit from Heathrow to New York last year; 180 George III walnut clocks; Goyas, Gainsboroughs and Rubens. Unfortunately this activity is not matched by stories of thieves being collared, receivers incarcerated and “mad collectors” being sent up the river. Profits are high, punishment all too easily evaded.”