Sorry to disagree!
But Uk is the norm!
Ask the next American you meet, ask his where he comes from... most will say
"The States"
Ask any English man where he comes from... The UK or United Kingdom.
If a foreigner heard you say GREAT Britain!
The first thing they might say in there mind is... Great... for what?
Football? most of the best paid footballers are foreign! :
Winning War's... Don't ask any American... they won the second you know!
Not that it's all bad of course...
We do have a very good reputation of being Larger Louts on the continent!
(in case Tosh reads this... Yes we have the Best Armed Forces in the world, second to done!)But ask yourself is that really what we want to be GREAT (proud) about?