Tho
It's looking likely that Scotland will split off and try to stay in the EU. Longer term Northern Ireland will probably merge with Eire, the remain majority there has strengthened the hand of the republicans. The Welsh aren't going to be happy because they currently get a lot of EU money which they will lose, so they they might well be wanting independence too at some point. Cornwall is, well, Cornwall.
I'm a fifth-generation Irish-American, my great-great grandmother having (most likely, since her maiden name was Gilligan, she was devoutly Catholic, was a massive rebel, and she came over alone as a teenager) come from the region around Belfast, so I know a little bit about the situation in Ireland today. (Key phrase being "a little bit." I do know, for instance, what you mean by Eire, but I don't know what the degree of nationalist tension is at the moment.)
I know the situation in Scotland isn't that dissimilar to what Ireland's was before indepednence. I also know the Welsh basically are the cultural and linguistic survivors of the pre-Anglo-Saxon British natives, and therefore probably would like independence for that reason alone.
But, I'm afraid your is lost on me, because I know almost nothing about Cornwall, except that they are another pre-AS group of British natives.
I could well imagine a trumpish vote to get out, followed by frantic googling to learn something about them.
Tom
Which, being frantic, would most likely cause people to be misinformed since they'd only see surface statements without stopping to consider nuance.
Heck, I've even heard people who typically share the same (liberal-leaning) views as me call the UN "useless."