Yes, Mr. Ben Kahan let's be honest here. Northern Ireland is a province of the United Kingdom not of Britain. The formal name of the country ruled from London is the United Kingdom of Northern Ireland and Great Britain--so no one is pretending that NI is part of Britain.
EU's Mogherini in Tehran to talk nuclear deal, regional issues (Reuters)
from the article: Britain bans ad promoting tourism to Israel for blurring 1967 borders