....and if I was been really Britkidesque and quoting people i,e an encyclopedia

Great Britain is an island lying off the northwestern coast of mainland Europe and to the east of Ireland, comprising the main territory of the United Kingdom. Great Britain is also used as a geopolitical term describing the combination of England, Scotland, and Wales, which together comprise the entire island and some outlying islands. Great Britain, and simply Britain, are used as informal names for the sovereign state properly known as the United Kingdom of Great Britain and Northern Ireland.