How has the united kingdom support the United Nations?

Bermuda is a British overseas territory that has self government.

England, Scotland, Wales and Northern Ireland together make the United Kingdom. The full name of the country at the United Nations is: The United Kingdom of Great Britain and Northern Ireland.

Yes, it most certainly is.

England, Northern Ireland, Scotland and Wales.

Yes. The full name of the country is The United Kingdom of Great Britain and Northern Ireland and is represented as such at the United Nations in New York.