Heads of Mission
Minister Resident and Consul-General
to the King of Siam
- 1885–1889: Sir Ernest Satow GCMG PC [1]
- 1889–1894: Cpt. Henry Jones VC [2]
- 1896–1900: Sir George Greville KCMG [3]
Envoy Extraordinary and Minister Plenipotentiary
- 1901–1903: Reginald Tower [4]
- 1904–1909: Sir Ralph Paget KCMG CVO PC [5]
- 1909–1915: Sir Arthur Peel KCMG [6]
- 1915–1919: Sir Herbert Dering
- 1919–1921: Richard Seymour
- 1921–1926: Sir Robert Greg KCMG [7]
- 1926–1928: Sir Sydney Waterlow KCMG CBE [8]
- 1928–1929: Sir Charles Wingfield KCMG [9]
- 1929–1934: Sir Cecil Dormer KCMG MVO [10]
- 1934–1941: Sir Josiah Crosby KCMG KBE CIE [11]
- 1941–1945: No representation
- 1945–1947: Sir Geoffrey Thompson GBE KCMG [12]
Ambassadors
to the Kingdom of Thailand
- 1947–1950: Sir Geoffrey Thompson GBE KCMG [12]
- 1950–1951: Sir John Magowan [13] (appointed in December 1950 but died before he could present his credentials)
- 1951–1954: Sir Geoffrey Wallinger GBE KCMG [14]
- 1954–1957: Sir Berkeley Gage KCMG [15]
- 1957–1961: Sir Richard Whittington KCMG [16]
- 1961–1965: Sir Dermot MacDermot KCMG CBE [17]
- 1965–1967: Sir Anthony Rumbold Bt KCMG KCVO CB [18]
- 1967–1970: Sir Neil Pritchard KCMG [19]
- 1970–1973: Sir Arthur de la Mare KCMG KCVO [20]
- 1973–1978: Sir David Cole KCMG [21]
- 1978–1981: Peter Tripp CMG [22]
- 1981–1986: Justin Staples CMG [23]
- 1986–1989: Derek Tonkin CMG [24]
- 1989–1992: Sir Ramsay Melhuish KBE CMG [25]
- 1992–1996: Christian Adams CMG [26]
- 1996–2000: Sir James Hodge KCVO CMG [27]
- 2000–2003: Barney Smith CMG [28]
- 2003–2007: David Fall CMG [29]
- 2007–2010: Quinton Quayle [30]
- 2010–2012: Asif Ahmad [31]
- 2012–2016: Mark Kent [32]
- 2016–2021: Brian Davidson [33]
