The United Kingdom of Great Britain and Northern Ireland, more commonly known as the United Kingdom or the UK is a sovereign state located off the northwestern coast of continental Europe. It is an island nation, spanning Great Britain and the north-east part of Ireland, although the whole island of Ireland was part of the United Kingdom between 1801 and 1922.
The United Kingdom is a unitary state consisting of four countries: England, Northern Ireland, Scotland and Wales.
It is governed by a parliamentary system with its seat of government in London, England, but with three devolved national administrations in Belfast, Northern Ireland; Cardiff, Wales and Edinburgh, Scotland. England does not have its own national administration.
For genealogy purposes see:
United Kingdom Geography