How has the United Kingdom maintained an important role in world affairs

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The diplomatic foreign relations of the United Kingdom are conducted by the Foreign and Commonwealth Office, headed by the Secretary of State for Foreign and Commonwealth Affairs. The Prime Minister and numerous other agencies play a role in setting policy, and many institutions and businesses have a voice and a role.

Britain was the world's foremost power during the 18th, 19th and early 20th centuries, most notably during the so-called "Pax Britannica"-a period of totally unrivaled supremacy and unprecedented international peace during the mid-to-late 1800s. The country continued to be widely considered a 'superpower' until the Suez crisis of 1956, and this embarrassing incident coupled with the loss of the empire left the UK's dominant role in global affairs to be gradually diminished. Nevertheless, the United Kingdom remains a great power and a permanent member of the United Nations Security Council, a founding member of the G7, G8, G20, NATO, OECD, WTO, Council of Europe, OSCE, and the Commonwealth of Nations, which is a legacy of the British Empire. The UK has been a member state of the European Union (and a member of its predecessors) since 1973. However, due to the outcome of a 2016 membership referendum, proceedings to withdraw from the EU began in 2017. Since the vote, policymakers have begun pursuing new trade agreements with other global partners.