Originally Posted by
cme17
Dublin is within the Common Travel Area and a passport is not technically required for British citizens. You are, however, required to confirm that you are a British citizen if asked.
I also don't get the 'travel within the UK, including Northern Ireland'. The UK is the United Kingdom of Great Britain and Northern Ireland - if we don't include Northern Ireland then isn't it just Great Britain?
It seems that ba.com says that a passport is not required if you are a British citizen or an Irish citizen
and you were born in the respective country - see
http://www.flyertalk.com/forum/26407885-post1729.html
I suspect that the wording about the UK is to remove any ambiguity, given the fraught politics that sometimes attends the question of Northern Ireland. It isn't wrong, even if one could regard it as partly tautological.