Alternative History
Great Britain
Kingdom of Great Britain
Timeline: Triangles and Crosses

OTL equivalent: Great Britain
Flag Coat of Arms
Flag Coat of Arms
Location of Great Britain
Location of Great Britain
Anthem "God Save the King"
Capital
(and largest city)
London
Other cities Manchester
Glasgow
Cardiff
Language English
Demonym British
Government Unitary parliamentary constitutional monarchy
  Legislature Parliament
Monarch Ferdinand II
Prime Minister Sadiq Khan
Area 209,331 km²
Population 65,181,000 
Established Laws in Wales Acts
1535 and 1542
Union of the Crowns
24 March 1603
Acts of Union of England and Scotland
1 May 1707
Acts of Union of Great Britain and Ireland
1 January 1801
Confederation Act
8 October 1885
Dissolution of the Commonwealth
25 December 1993
Currency Pound sterling
Time Zone UTC (WET)
  summer UTC+1 (WEST)
Driving Side left
Calling Code +44
Internet TLD .gb

The Kingdom of Great Britain, commonly known as Great Britain (GB), or informally just as Britain, is a sovereign country in north-western Europe, off the north-­western coast of the European mainland. Its territory includes the island of Great Britain and many smaller islands within the British Isles. It is surrounded by the Atlantic Ocean, with the English Channel separating Great Britain and France, and the Irish Sea separating Ireland. The total area of Great Britain is 209,331 square kilometers, with an estimated population of 65 million people.

Great Britain has evolved from a series of annexations, unions and separations of constituent countries over several hundred years. The Treaty of Union between the Kingdom of England (which included Wales, annexed in 1542) and the Kingdom of Scotland in 1662 formed the Kingdom of Great Britain. Its union in 1715 with the Kingdom of Ireland created the United Kingdom of Great Britain and Ireland.

The modern history of Great Britain comes with the formation of the United Commonwealth of British Nations in 1885. A confederation, the number of entities in the Commonwealth varied throughout the years. After World War II, the United Commonwealth emerged as a superpower along with Germany, entering the Cold War. Following the calls for autonomy, the Commonwealth as a proper state was dissolved and reformed as a political and economic union between the former states.

Great Britain is a unitary parliamentary democracy and constitutional monarchy. With its capital in London, the country is generally considered the successor state to the former United Commonwealth and a great power. The monarch, King Ferdinand II, has reigned since 2021. The capital and largest city is London, a global city and financial centre with a metropolitan area population of 14 million. Great Britain consists of three crowns: England, Scotland and Wales. All the constituent countries have their own devolved governments, each with varying powers.