I see four people in front of me. One is from Wales, one is from Scotland, one is from England and one is from Northern Ireland. I can say about each one "He is Scottish/Welsh/English". But, how do I say it about all of them? As far as I heard, Great Britain is the island, so I cannot say "They are British" because that would exclude the man from Northern Ireland. "They are United Kingdomers"... I doubt that it is correct. So, is there a word that could be used in such phrase and mean "They are from United Kingdom"?
Additional question: is there a word that refers to someone from Northern Ireland? Northern Irish?