List of ambassadors of the United Kingdom to Thailand

The Ambassador of the United Kingdom to Thailand is the United Kingdom's foremost diplomatic representative in Thailand, and head of the UK's diplomatic mission in Thailand. The official title is His Britannic Majesty's Ambassador to the Kingdom of Thailand. The first British Consul to the Kingdom of Siam was appointed in 1856 after the signing of the Anglo-Siamese Treaty of 1855. The consulate was elevated to a Legation in 1885, and to an Embassy in 1947.

Minister Resident and Consul-General
to the King of Siam
 * 1885–1889: Sir Ernest Satow
 * 1889–1894: Cpt. Henry Jones
 * 1896–1900: Sir George Greville

Envoy Extraordinary and Minister Plenipotentiary

 * 1901–1903: Reginald Tower
 * 1904–1909: Sir Ralph Paget
 * 1909–1915: Sir Arthur Peel
 * 1915–1919: Sir Herbert Dering
 * 1919–1921: Richard Seymour
 * 1921–1926: Sir Robert Greg
 * 1926–1928: Sir Sydney Waterlow
 * 1928–1929: Sir Charles Wingfield
 * 1929–1934: Sir Cecil Dormer
 * 1934–1941: Sir Josiah Crosby
 * 1941–1945: No representation
 * 1945–1947: Sir Geoffrey Thompson

Ambassadors
to the Kingdom of Thailand
 * 1947–1950: Sir Geoffrey Thompson
 * 1950–1951: Sir John Magowan (appointed in December 1950 but died before he could present his credentials)
 * 1951–1954: Sir Geoffrey Wallinger
 * 1954–1957: Sir Berkeley Gage
 * 1957–1961: Sir Richard Whittington
 * 1961–1965: Sir Dermot MacDermot
 * 1965–1967: Sir Anthony Rumbold
 * 1967–1970: Sir Neil Pritchard
 * 1970–1973: Sir Arthur de la Mare
 * 1973–1978: Sir David Cole
 * 1978–1981: Peter Tripp
 * 1981–1986: Justin Staples
 * 1986–1989: Derek Tonkin
 * 1989–1992: Sir Ramsay Melhuish
 * 1992–1996: Christian Adams
 * 1996–2000: Sir James Hodge
 * 2000–2003: Barney Smith
 * 2003–2007: David Fall
 * 2007–2010: Quinton Quayle
 * 2010–2012: Asif Ahmad
 * 2012–2016: Mark Kent


 * 2016–2021: Brian Davidson