William Douglas Park was a consultant general surgeon at Oldchurch Hospital and King George V Hospital, Ilford. He was born in Melbourne on 15 November 1912, the son of Charles Leslie Park, a doctor, and Lilian née Davis, the daughter of a timber merchant. He was educated at Melbourne Grammar School

Harold Daintree Johnson was born in London on 26 May 1910, the second son of Sir Stanley Johnson, a solicitor and one-time Conservative MP for Walthamstow. His mother, Edith Heather, was the daughter of a professor of mathematics. After education at Westminster School he entered University College L

Hugh Fraser Anderson was born in Manchester on 19 April 1910, the son of William Thomson Anderson, a mining electrical engineer, and his wife, Madeleine, née Grubb. He was educated at King William's College in the Isle of Man. In 1929 he gained an entrance exhibition to Caius College, Cambridge, and