Harold Holmwood Renyard was a consultant surgeon in Nottingham and Newark. The son of a south London policeman, he studied medicine at King's College Hospital Medical School, qualifying in 1940. During the Blitz he worked as a casualty officer, and later served as a surgeon lieutenant in the Navy

Athol George Riddell was born in Whitstable on 31 January 1917. He was educated at Folkestone and University College, London, where he gained the Gold Medal in physiology, graduating from University College Hospital Medical School in 1939. After holding a resident surgical post on the Professorial U

Colin Craig was born in Manchester on 11 November 1915, the son of Colin McKean Craig, a medical practitioner of Kendal, Westmorland, and Sophia Maud née McKinna, a nurse. He was educated at Monkton Combe School and St Bartholomew's Hospital. He completed junior casualty posts under Harold Rogers at