@arabes: Uhm, you do know that big Island, the one with England, Wales AND Scotland is called Great Britain right? And that there is no region just called "Britain" that excludes Scotland. So if you want to be overly technical, anyone from England Scotland or Wales can call themselves "British" if they so choose. Also I think you should know that the official demonym for people from the United Kingdom (i.e. not only England Scotland and Wales, but Northern Ireland too) is British. I suggest you think very carefully before posting a big long rant full of nonsense.
Great Britain is the official collective name of of England, Scotland and Wales and their associated islands. It does not include Northern Ireland and therefore should never be used interchangeably with ‘UK’ – something you see all too often.
Here at Ordnance Survey, we’re responsible for mapping Great Britain, which is why we don’t make maps of Northern Ireland.
Technically, if you lose the ‘Great,’ Britain only refers to England and Wales.
You see that last line there in italics. This is an extract from the British Ordinance survey web page. And seeing as how they do all the maps for Great Britain I'll take their word for it over yours. If you'd bothered to read the post then you would see that everything I said there I took from their page. Oh and starting your posts with "Uhm" makes you seem like a bigger dick head than you probably are.
@diamonddog: Whether or not you are British doesn't matter, what I put up there were the definitions as laid down by your government, not you. Why don't you read the post before you start talking out of your ass.