Portugal–United Kingdom relations

Portugal and the United Kingdom maintain bilateral relations. The relationship, largely driven by the nations' common interests as maritime countries on the edge of Europe and close to larger continental neighbours, dates back to the Middle Ages in 1373 with the Anglo-Portuguese Alliance.

Both countries share common membership of the Atlantic Co-operation Pact, the Council of Europe, NATO, the OECD, the OSCE, the United Nations, the World Health Organization, and the World Trade Organization. Bilaterally the two countries have the Anglo-Portuguese Alliance, and a Double Taxation Convention.