John Keast-Butler was a consultant ophthalmologist at Addenbrooke’s Hospital in Cambridge. He was born in London on 26 September 1937. His father, Joseph Alfred Keast-Butler, was a salesman and his mother, Mary Loise Brierley, was a secretary. He was educated at University College School and went up

John Alan William McKelvey was a consultant ophthalmologist for the Cornwall Hospitals Trust. He was born in 1932 into a farming family in Northern Ireland. He studied medicine at Queen's University, Belfast, qualifying in 1955. He held junior hospital posts at Belfast City Hospital, and in 1957