John Leslie was born in Bath on 22 December 1914. His father, George Herbert Leslie, was a schoolmaster and inspector of schools for the London County Council, having served in the Royal Artillery in the first world war and then with the Army Education Corps. His early education was at Wellington

Sir Richard Doll, the most distinguished epidemiologist of his generation, established that smoking causes cancer and heart disease. Born in Hampton, Middlesex, on 28 October 1912, he was the son of Henry William Doll, a general practitioner, and Amy Kathleen Shaboe. He was educated at Westminster a

Cedric Longland was born at Bolobo in the Belgian Congo on 30 September 1914. His father, Frank Longland, was a civil engineer in East Africa and later Provincial Commissioner for Tanganyika Territory. Daisy Longland, Cedric's mother, was one of the earliest women to qualify in medicine at Edinburgh

Michael Reilly was born in Sheringham, Norfolk, on 30 August 1913, several weeks post-mature. This procrastination was to be a feature of his life. There was a suggestion that he should be christened 'Fabius', after the great Roman general Fabius Maximus Cunctator, but he was saddled with the family