- Great Britain is an island in Europe.
- Great Britain refers geographically to the island of Great Britain, politically to England, Scotland and Wales in combination.
- The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a sovereign state in Europe [...]
- The UK consists of four countries: England, Scotland, Wales, and Northern Ireland.
- [...] it includes the island of Great Britain (the name of which is also loosely applied to the whole country), the north-eastern part of the island of Ireland and many smaller islands.
- The nearby Isle of Man, Bailiwick of Guernsey and Bailiwick of Jersey are not part of the United Kingdom, being Crown dependencies [...]
- GB and GBR are the standard country codes for the United Kingdom (see ISO 3166-2 and ISO 3166-1 alpha-3) and are consequently used by international organisations to refer to the United Kingdom.
- On the Internet, .uk is the country code top-level domain for the United Kingdom.
The fourteen British Overseas Territories (BOT) are territories under the jurisdiction and sovereignty of the United Kingdom.
Being independently administered jurisdictions, they are not part of the United Kingdom nor British Overseas Territories. They are self-governing possessions of the Crown (defined uniquely in each jurisdiction). However, internationally, the dependencies are recognised as "territories for which the United Kingdom is responsible".
Sources
There is a .gb domain .. just .uk became more popular over time