Joseph Mason qualified from St Bartholomew's Hospital in 1935 and received his training in surgery at Chesterfield Royal Hospital and Hull Royal Infirmary. He had a special interest in urology and was resident medical officer at St Paul's Hospital. He was consultant surgeon to Hull and East Riding H

Trevor Lewys Stanhope Baynes was born on 19 February 1911 in Brockley, Kent, the only son of an insurance official, Evan Lewys Baynes and his wife Ethel. He attended Lewisham Park Preparatory School and Dulwich College, before becoming a medical student at St Bartholomew's Hospital, London, winning