The official title is His Britannic Majesty's Ambassador to the Kingdom of Spain.

In 1822, the Foreign Secretary at that time, George Canning, downgraded the Embassy to a Mission, and the Head of Mission from an Ambassador to an Envoy Extraordinary and Minister Plenipotentiary, to reflect Spain's decreased importance on the world stage.

The Mission in Madrid was upgraded to a full Embassy once more on 9 December 1887.

[2] The following is a partial list of British ambassadors to Spain.

Titles of the heads of mission: James Stanhope, 1st Earl Stanhope (joint envoys)[21][22] {1710 King Felipe VI of Spain Charles III