John Douglas Fergusson was born on 5 December 1909 at Great Malvern, Worcestershire, the son of John Newberry Fraser Fergusson, FRCS Edinburgh, radiologist at York County Hospital. He was educated at St Peter's School, York, and St John's College, Cambridge, where he was college prizeman and scholar

Irvine Smith was a consultant surgeon to Burton-on-Trent General Hospital. He was born in Ilkley on 5 December 1919. His father, Fredric Battinson Smith, was a forensic pathologist who had won the Military Cross in the first world war and later advised the Ministry of Health on setting up a national