Dennis Henry George Walker was born in Thames Ditton, Surrey, on 17 January 1917, the eldest son of Thomas Presland Walker, a bank official and Edith Mildred Walker, née Passey. He attended Clare House School, Beckenham, Kent, and Eltham College, Mottingham. He studied medicine at King's College and

Evan Griffiths was a consultant surgeon at Bridgend Hospitals, South Wales. He was born into West Wales farming stock on 13 December 1916. His father, Edgar Griffiths, owned and ran a grocery business in Llanelli. His mother was Mary Evans. Early schooling was at Llanelli Grammar School, where he di