The countries of the the United Kingdom are Scotland, Wales, England and Northern Ireland. The population of the United Kingdom is 58 milion. The capital of the United Kingdom is London. London is also the capital of England.
Edinburgh is the capital of Scotland. Cardiff is the capital of Wales and Belfast is the capital of Northern Ireland.
The national flag of the United Kingdom is the Union Flag or Union Jack. The flags of Scotland, England and Northern Ireland are in Union flag. The Welsh flag isn't. England, Scotland and Wales are on a big island, called Great Britain. Northern Ireland is on a separate island.