The ambassador of Great Britain to Portugal was the foremost diplomatic representative of the Kingdom of Great Britain in Portugal, which was established by the Treaty of Union in 1707. The ambassador was in charge of the British diplomatic mission.

For ambassadors from the Court of St James to Portugal before 1707, see the list of ambassadors of the Kingdom of England to Portugal. For ambassadors after 1800, see the list of ambassadors from the United Kingdom to Portugal.

Heads of mission 1707–1708: Sir Paul Methuen (last English ambassador to Portugal)Karl Wolfgang Schweizer, ‘Methuen, Sir Paul (c.1672–1757)’, in Oxford Dictionary of National Biography (Oxford University Press, 2004; online edition, October 2008) Paul Methuen, accessed 3 November 2008; G. F. R. Barker, ‘Methuen, John (1650–1706)’, revised Thomas Doyle, in Oxford Dictionary of National Biography (Oxford University Press, 2004; online edition, October 2008. Retrieved 4 November 2008. 1708–1710: Henri de Massue, Earl of GalwayHarman Murtagh, ‘Massue de Ruvigny, Henri de, earl of Galway, and marquess of Ruvigny in the French nobility (1648–1720)’, Oxford Dictionary of National Biography, Oxford University Press, Sept 2004; online edn, Jan 2008 Henri de Massue de Ruvigny. Retrieved 17 April 2009.D. B. Horn, British Diplomatic Representatives 1689-1789 (Camden 3rd Ser. XLVI, 1932). 1709–1710: Thomas Leffever Chargé d'affaires in absence of Galway>L. M. E. Shaw, The Anglo-Portuguese Alliance and the English Merchants in Portugal (Ashgate, Aldershot 1998) 1710–1714 George DelavalThe National Archives, catalogue, class SP 89 1714–1722: Henry Worsley 1722–1724: Hon. Thomas Lumley 1725–1728: Brigadier James Dormer 1728: Charles Crompton Chargé d'affaires 1728–1742: Lord Tyrawley 1742–1745: Charles Crompton (Chargé d'affaires from 1741) 1745: Abraham Castres Chargé d'affaires 1745–1749: Sir Benjamin Keene 1749–1757: Abraham Castres 1757–1767: Hon. Edward Hay 1760: Thomas Hay, 9th Earl of Kinnoull Special Mission 1762: Lord Tyrawley Envoy Plenipotentiary 1767–1770: William Henry Lyttelton (created Lord Westcote in 1776 and Lord Lyttelton in 1794): Envoy-extraordinary and PlenipotentiaryP. J. Marshall, ‘Lyttelton, William Henry, first Baron Lyttelton and first Baron Westcote (1724–1808)’, Oxford Dictionary of National Biography, Oxford University Press, Sept 2004; online edn, Jan 2008 accessed 22 March 2008; Burkes Peerage and Baronetage (1939), s.v. Cobham, Viscount 1771–1800: Hon. Robert Walpole Envoy Extraordinary and Plenipotentiary 1786: William Fawkener (jointly with Walpole) for negotiating commercial affairsLondon Gazette, Issue 12792, p. 476 1800: John Hookham Frere (first United Kingdom ambassador to Portugal)

References