Kenneth George Frederick Mackenzie was a general surgeon at Shotley Bridge Hospital, County Durham. Born on 20 June 1911 in Brookwood, Surrey, he was the only son of John Mackenzie, a colonel in the RAMC and his wife Hilda Constance née Johnston. After attending Arnold House, a preparatory school in Llandulas, North Wales, he went on to Uppingham School and then to Gonville and Caius College, Cambridge. After initially training at St Thomas’ Hospital where he was mentored by Philip Mitchiner, he became house surgeon and casualty officer at the West London Hospital in 1936. He served with the RAMC for ten years from 1936 to 1946 and retired with the rank of lieutenant colonel. In 1937 he passed the fellowship of the college. From 1946 to 1950 he was on the staff of the North Staffs Royal Infirmary, coming under the influence of John Stephen Ramage. He was then appointed consultant surgeon at Shotley Bridge and eventually became a member of the North West Durham Hospital Management Committee. In 1940 he married Sheila Heath Joyce and they had three sons. Sheila died in 1970 and he married an anaesthetist, Helen Elizabeth Gordon. Outside medicine he enjoyed gardening, driving and travel. He died in January 2000 aged 88.