Mill Reef, who won the Derby, the Prix de l’Arc de Triomphe, the Eclipse and the King George by far enough for jockey Geoff Lewis to declare ‘daylight was second’, was one of my first equine heroes. One image has always stuck in my mind. Trainer Ian Balding sent Mill Reef and a companion out on a watered gallop at Lamorlaye for a final pipe-opener before the Arc.