UK

The United Kingdom of Great Britain and Northern Ireland (usually shortened to the United Kingdom, the UK or Britain)[5] is a country and sovereign state that lies to the northwest of mainland Europe, with the Republic of Ireland as its only land border.[6][7][8][9] It extends over all of the island of Great Britain and the north-east part of the island of Ireland.

The United Kingdom is bounded by the Atlantic Ocean, and its ancillary bodies of water, including the North Sea, the English Channel, the Celtic Sea, St George's Channel, and the Irish Sea. The United Kingdom is linked to France and Continental Europe by the Channel Tunnel.

The United Kingdom is a constitutional monarchy composed of four constituent countries: England, Scotland, Wales and Northern Ireland. The current monarch is Queen Elizabeth II, who is also the Queen and Head of State of fifteen other Commonwealth Realms, including Canada, Australia, New Zealand and Jamaica. The Crown Dependencies of the Channel Islands and the Isle of Man, formally possessions of the Crown, form a federacy with the United Kingdom collectively known as the British Islands. The UK also has fourteen overseas territories,[10] all remnants of the British Empire which at its height encompassed a quarter of the world's surface and population.

Although Britain was the foremost great power during the 19th century, the economic cost of two world wars and the decline of its empire in the latter half of the 20th century diminished Britain's status in global affairs. However, as a permanent member of the United Nations Security Council, a nuclear power, a member of the G8, the world's fifth largest economy, and having the second highest defence spending, Britain remains an important political, economic and military world power. It is a member of the European Union and the Commonwealth of Nations.