It's Britons. People from that island are called Britons. Not Brits - that was a word invented by lazy tabloid journalists and it makes me cringe everytime I hear it.
(Kag) V good. I actually LOL'ed. (pen) I think it's an American invention, not a tabloid one, though the latter (and many others) have picked it up. I'll use it when Americans start to regard it as cool to refer to themselves as Yanks.