His Headmaster, R B Henderson, at Alleyn’s School, Dulwich, exhorted service to school, community and country; Reginald Jones was a proud member of the Officers’ Training Corps, and as a hobby enjoyed making radio-receiving sets. Good teaching brought an Open Exhibition to Wadham College, Oxford in 1929. Jones gained a First Class Honours in Natural Science- Physics (1932) and the same year, he was runner-up in pistol-shooting at Bisley. Under Oxford’s Professor of Experimental Philosophy, F A Lindemann, he began research on infrared detectors, being awarded his doctorate at the age of 23. During a subsequent post at Balliol College, Jones was commissioned to develop an infrared detector for installation in night-fighters for detection of bombers. In 1936 he was appointed a Scientific Officer in the Air Ministry. His duties included trials on the first air-borne television equipment for the RAF, and study of Air Intelligence reports. On his transfer to the Admiralty Research Laboratory, Teddington, he was to meet in 1938 Vera Cain when she chased away a squad of physicists who were trying to dig shelter trenches on her women’s hockey pitch. They married in 1940.