Donald Barlow was born on 4 July 1905 in Leytonstone, son of Leonard Barlow, an electrical engineer, and Katherine Monteagle. His eldest brother Leonard was killed at the age of 18 after winning the MC with two bars in the Royal Flying Corps; the second became FRS and a professor at University Colle

Robin Pilcher was born on 22 June 1902 in Northwood, Middlesex, into a family without medical connections, although his younger brother Michael was to follow him into surgery. His father was Thorold Sturtevant Pilcher and his mother Helena, née Neilson. He was a scholar at St Paul's School and a pri