UK participates with four (!?) "countries" in football - but BBC News talks mostly about England and cricket. And only England voted for Brexit.
The border between EU and UK Brexiters pretend not to see.
Interestingly, Ireland is in old Nordic/Swedish called Irrlande, meaning the land you get lost in or loose (comp. Swed. irra meaning err, or get lost). This could have been a change in the use of the word Eire - or even some common ancestor. And the word 'land' comes from Fennoscandia and is first observed in Gothic texts (various etymologies you see all over the web are just theoretical guesswork).
UK consists of England plus three satellites: Wales, Northern Ireland and Scotland.
England colonized Ireland but lost most of it except Northern Ireland.
When Scotland ruined its economy England had already sucked up so much wealth from its wars and colonies etc. that it could easily buy it up with similarly diffuse and unreliable promises it used against Ireland. It didn't even bother to write down its "deal" with corrupt Scottish politicians. Which fact doesn't seem to hinder them calling it a "constitution".
So unlike most other civilized modern states UK doesn't have a real constitution. Which fact may explain why only in UK such a political anomaly as the Brexit vote could possibly have passed unchallenged. People weren't told what they voted for but Theresa May will deliver it.
In a civilized modern state issues of such an importance could never be as lightly handled.