http://www.youtube.com/watch?v=rNu8XDBSn10
The Difference between the United Kingdom, Great Britain and England Explained
UK means United Kingdom of Great Britain and Northern Ireland.
The video is short and explains the history.
Four “co-equal” countries united as UK.
As I am English and was studying constitutional law in all likelihood before you were even a twinkle in your father’s eye, I think I’ll pass. And if the alternative to a constitutional monarch are individuals like Kennedy, Nixon, Clinton and Obama, I think we’d be far better off sticking with what we have.