Isn't the only difference between Great Britain and the United Kingdom...the addition of Northern Ireland? The way I am told it works is: Great Britain includes: 1) England, Wales, and Scotland United Kingdom includes: 2) England, Wales, Scotland, and Northern Ireland. I think there are also some small Islands included in the above. There is a explanation of the differences somewhere on the internet (Video), and that is the way it is explained. Then there is the Commonwealth of Nations....but we'll save that one for another day. LOL!