Do you know your UK geography?

If you're in Ireland, are you in Great Britain or the United Kingdom?

Contrary to popular usage, "Great Britain" and "United Kingdom" are not interchangeable terms. According to the CIA Factbook, Great Britain (also known simply as "Britain" or "the British Isles") is made up of England, Scotland and Wales. The United Kingdom's full name is actually "the United Kingdom of Great Britain and Northern Ireland" though it is usually called the United Kingdom or UK.

So if you are in Belfast, you're in Northern Ireland and the UK. If you're in Dublin, you are just in Ireland. Travel advice and pre-trip research should take into account these geographical and political differences. Most government sources will provide advice for both the UK and Ireland.