Laurence Edgar Davison was born in London on 4 April 1907, the son of Edgar Knights, a master tailor, and Katherine, née Davison. His early education was at Cheltonia College and later at Dulwich College before entering Middlesex Hospital Medical School, qualifying in 1931. During house appointments

Richard Sutcliffe was born on 26 April 1904 in Boston, Lincolnshire, the second son of John Bell Sutcliffe, a shipowner and broker. He was educated at Kirton Grammar School in Lincolnshire and Panel Ash College, Yorkshire, before going to Sedbergh, from where he gained entry to St John's College, Ca