Good work hitssquad.
In order of size:
British Isles: Used colloquially, not a political term. Includes England, Scotland, Wales, ALL of Ireland, as well as the other pissy little islands (Orkneys, Shetlands, Angelsey, Channel Islands etc)
The United Kingdom of Great Britain and Northern Island: The proper, political name for England, Scotland, Wales and Northern Ireland along with pissy islands.
Great Britain: Just the big, main island, comprising of England, Scotland & Wales, not a political term. By this definition, the Irish could take exception to being called British.
England, Scotland and Wales. Wales is a principality. There are also Crown Dependencies and British Overseas Territories, but nobody wants to know about those, and nobody really knows where they all are anyway.
I've had an irritated thing about this ever since I saw Mrs Doubtfire, where she told the little kids that England was an island. Dumb wench!
Wasteofo2: I reckon if you guys staged some kind of monster coup, we really would just sit back and watch the fireworks, so long as you didn't try and mess with the actual governing of our country. Bring it on!