Archibald Gavin Hamilton, Baron Hamilton of Epsom, PC (born 30 December 1941) is a British Conservative Party politician. A member of the House of Lords, he served as Minister of State for the Armed Forces under John Major.

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Quick Facts The Right HonourableThe Lord Hamilton of EpsomPC, Minister of State for the Armed Forces ...

The Right Honourable The Lord Hamilton of Epsom PC
Official portrait, 2020
Minister of State for the Armed Forces
In office 25 July 1988 – 27 May 1993
Prime Minister	Margaret Thatcher John Major
Preceded by	Ian Stewart
Succeeded by	Jeremy Hanley
Member of Parliament for Epsom and Ewell
In office 27 April 1978 – 14 May 2001
Preceded by	Peter Rawlinson
Succeeded by	Chris Grayling
Member of the House of Lords Lord Temporal
Incumbent
Assumed office 17 June 2005 Life Peerage
Personal details
Born	(1941-12-30) 30 December 1941 (age 82)
Nationality	British
Political party	Conservative
Portfolio	Trustee of Supporting Wounded Veterans, President of the Lest We Forget Association

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Hamilton is the second son of the 3rd Baron Hamilton of Dalzell, a Lord-in-waiting to the Queen. The title was created for Hamilton's great-grandfather, John Hamilton, 1st Baron Hamilton of Dalzell, who was a Liberal politician, and was inherited by his second son, Gavin Hamilton, 2nd Baron Hamilton of Dalzell, also a Liberal politician, before passing to his nephew, Hamilton's father. His mother, Rosemary Coke, was a daughter of Major Sir John Spencer Coke, son of Thomas Coke, 2nd Earl of Leicester; her maternal grandfather was Harry Lawson, 1st Viscount Burnham.

He is the younger brother of the 4th Baron Hamilton of Dalzell, and was born at Beckington Castle, Beckington, Somerset, which was then his parents' country house.^[1] He was educated at Eton College.

Hamilton was a Conservative councillor in Kensington and Chelsea from 1968 to 1971. He initially attempted to enter Parliament for Dagenham at the February and October 1974 elections, but was defeated by Labour's veteran incumbent, John Parker.

He won the seat of Epsom and Ewell at a 1978 by-election. He held it until his retirement from Parliament in 2001.

During his Parliamentary career he served as Parliamentary Private Secretary (PPS) to the Secretary of State for Energy (1979–81) and Transport (1981–82). From 1982 to 1984, he was Assistant Conservative Whip. In 1984 he became Lord Commissioner to HM Treasury, a position he held until 1986. From 1986 to 1987, Hamilton was Parliamentary Under-Secretary of State at the Ministry of Defence.

He also served as PPS to Prime Minister Margaret Thatcher (1987–88), Minister of State, Ministry of Defence (Armed Forces Minister, 1988–93) and was created a Privy Councillor in 1991. He was Chairman of the 1922 Committee from 1997 to 2001.

Whilst an MP, he sat on the Standards and Privileges Committee (regarding Ethics of the Lords and Commons) in 1996. From 1994 to 1997, he also served on the Intelligence and Security Committee.

He was knighted in 1994.^[2] On 13 May 2005 it was announced that he would be created a life peer, and the peerage was gazetted on 17 June 2005 as Baron Hamilton of Epsom, of West Anstey in the County of Devon.^[3]

Since 2015, he has sat on the Joint Committee for the National Security Strategy.

Hamilton is a bridge player. He is a member of the Lords bridge team and the All Party Parliamentary Bridge Group.

In 1968, he married Anne Catherine Napier (born 1940), daughter of the late Commander Trevylyan Michael Napier DSC, RN. (1901-30 August 1940) and poet and author Priscilla Hayter (1908–98), who produced books about Napier ancestors, poetry and an autobiography, A Late Beginner, which is still in print. Anne is an accomplished sculptor and painter. The couple have three daughters.

In 2006, their youngest daughter Alice Rose Alethea Hamilton married Dominic Johnson, financier, hedge fund manager, and government minister.^[4]

Hamilton sits in the House of Lords, and is a trustee of Supporting Wounded Veterans ^[5] as well as being the president of the Lest We Forget Association.