British Prime Minister Harold Wilson with members of his Labour cabinet; Shirley Williams (left) and Barbara Castle, in the garden of 10 Downing Street, London, April 4th 1974. (Photo by Ian Showell/Keystone/Getty Images)
British Prime Minister Harold Wilson with members of his Labour cabinet; Shirley Williams (left) and Barbara Castle, in the garden of 10 Downing Street, London, April 4th 1974. (Photo by Ian Showell/Keystone/Getty Images)