Ian Langdale Gregory qualified MB ChB from Manchester University in 1943 and passed the Conjoint Diploma the same year. He worked as supernumerary chief assistant at the Manchester Royal Infirmary and then became surgical registrar to the Withington Hospital, Manchester. He moved to London and was associate registrar at Guy's before becoming senior registrar in urology at St Peter's Hospital. He was a fellow of the Manchester Medical Society and an associate member of the British Association of Urological Surgeons. He moved to the USA and joined the American College of Surgeons. He was appointed to the staff of the Little Falls Hospital, New York State in 1972 and was probably still working there when he died on 3 August 1979.