Swinton was
commissioned into the
Scots Guards on 24 March 1944, and was twice wounded towards the end of the
Second World War. He was promoted to
lieutenant on 8 November 1947. He served in
Malaya during the
Indonesia–Malaysia confrontation and was
mentioned in despatches. Swinton was promoted to captain on 21 April 1952. Between 1953 and 1954, he was
aide-de-camp to Field Marshal
Sir William Slim,
governor-general of Australia. Swinton was successively promoted to major on 21 April 1959, to lieutenant colonel on 1 April 1966, commanding the Scots Guards (1970–71), to full colonel on 30 June 1970, and to brigadier on 31 December 1971. He was promoted to
major general and appointed
Major-General commanding the Household Division and
General Officer Commanding London District in 1976. In 1977, he was appointed Brigadier of the Queen's Body Guard for Scotland (The
Royal Company of Archers). In 1980, Swinton became a
deputy lieutenant for
Berwickshire, and went on to be
Lord Lieutenant of Berwickshire from 1989 to 2000, escorting the
Stone of Scone back to Scotland in 1996. ==Personal life==