The United Kingdom of Great Britain was a state located on the island of Great Britain north of the Europe continent on Earth. It was first established in 1707 as the Kingdom of Great Britain. In 1801, it became the United Kingdom of Great Britain and Ireland with the fusion of the Kingdom of Great Britain and the Kingdom of Ireland. Citizens of the United Kingdom were known as Britons. The United Kingdom was a constitutional monarchy. The monarch, in the person of either a King or Queen, served as a ceremonial head of state. The actual power of the government rested with the Prime Minister and a Parliament.
Originally, England, Scotland, and Wales were the constituent countries that united to form the Kingdom of Great Britain. Ireland was added in 1801 and continued as a part of the United Kingdom until the 1920s, when most of it won independence; upon that point, the state became known as the United Kingdom of Great Britain and Northern Ireland, due to the continued presence of six northern Irish counties within the UK. However, in 2025, Northern Ireland was reunited with the rest of Ireland, and the United Kingdom reverted to its original form. (TNG episode: "The High Ground").
London was the capital city of the United Kingdom. Throughout the 1800s, the United Kingdom was the dominant political power on Earth, operating a vast empire that was the largest in the planet's history. It was often said that the sun never set on the British Empire. This colonial period later proved untenable, and, as with the colonial habits of many other European states, contributed to human rights abuses and to extreme global instability in subsequent generations. Nonetheless, the United Kingdom was also a center of world culture, learning, and scientific and political advancement.
The United Kingdom, like the rest of Earth's old polities, eventually joined United Earth some time between UE's founding in 2130 and 2150, the year the last hold-outs became a part of the world state. (TNG episode: "Attached", ST novel: Articles of the Federation.) London later became the site of Alpha Centauri's Embassy on Earth, lasting into the 2370s. (DS9 novel: Hollow Men.)
Throughout its history, the United Kingdom operated a Royal Navy. The Reed family served in the Royal Navy for generations; the United Kingdom continued to operate the Royal Navy as late as the 2150s. (ENT episode: "Silent Enemy".)
In real life, the Flag of the United Kingdom is a composite of the flags of the former Kingdoms of England, Scotland, and Ireland. Whether or not the Flag continued to make use of St. Patrick's Cross, the former Kingdom of Ireland's contribution to the united British flag, after the Irish reunification of the 2020s is unknown, though this article makes use of the modern Union Flag.
|Earth states, organizations and geographical regions|
|Planetary State||United Earth||International organizations||United Nations • New United Nations|
|Africa||Pan-African Alliance||African Confederation (Somalia) • Egypt • Madagascar • Mali • Senegal • South Africa • United States of Africa (Kenya)|
|Asia||Eastern Coalition||China • India • Japan • Kazakhstan • Korea • Malaysia • Mughal Empire • Pakistan • Russia • Soviet Union • Singapore • Thailand • Tibet|
|Europe||European Alliance • European Hegemony • European Union • Mediterranean Alliance||Belgium • Czechoslovakia • Denmark • France • German Democratic Republic • Germany • Gibraltar • Greece • Hungary • Iceland • Ireland • Italy • Netherlands • Norway • Poland • Portugal • Roman Empire • Serbia • Soviet Union • Spain • Switzerland • Turkey • Ukraine • United Kingdom (England, Scotland, Wales) • Yugoslavia|
|Middle East||Muslim Bloc||Arabia • Iran • Iraq • Israel • Lebanon • Turkey|
|North America||Caribbean Alliance||Canada • Confederate States of America • Cuba • Jamaica • Mexico • Panama • Puerto Rico • Tobago • Trinidad • United States of America|
|Oceania and Antarctica||Australia • Easter Island • Indonesia • New Zealand • Norfolk Island • Pitcairn • Solomon Islands|
|South America||Brazil • Chile • Venezuela|