El Salvador and the United Kingdom established diplomatic ties in 1883.

[1] Both countries share common membership of the International Criminal Court, the World Trade Organization, and the Central America–UK Association Agreement.

[3] From 1 August 2013 until 30 December 2020, trade between El Salvador and the UK was governed by the Central America–European Union Association Agreement, while the United Kingdom was a member of the European Union.

[4] Following the withdrawal of the United Kingdom from the European Union, the UK and El Salvador signed the Central America–United Kingdom Association Agreement on 18 July 2019.

[2][5] Trade value between Central America and the United Kingdom was worth £2,624 million in 2022.