Meh. Not worried at all.
I'm an EU-arrival, from one of the 'Swan-eating' countries. Yep, the dreaded Eastern European.
I came to the UK to study, did so, created my business afterwards, purchased a place to live. Haven't received any benefits, didn't use the NHS (because it's shit, went back for treatment to my country), paid the appropriate taxes, didn't break the law, paid my student loan back.
In other words, I didn't do anything spectacular here, but neither do I feel somehow specifically 'grateful' to UK. For what? I paid for my education, paid for my housing, created my place of work, supported myself and paid the taxes. So I'm sick to the back teeth with the narrative about living in the UK being 'such a PRIVILEGE', we should be so grateful, strive to become 'British' and so on. Except even if I would apply to become a citizen (which I won't), no one would consider me British, not really. I'd always be an immigrant (not an ex-pat, seems like only true-blood Brits can be those).
Well fuck that. I'm not British, never wanted to be, don't want to be, and won't become one. I can afford it and could do it, but it sticks in my craw I'm supposed to grovel and be so immensely grateful for such a massive 'privilege'. I much prefer my actual nationality, tbh.
To tell you the blunt truth, UK is nothing special, nothing fantastic and nothing so great. It's a normal enough country, ups and downs, there are worse, there are better, but it's certainly not any sort of paradise Europeans should salivate and demean themselves over.
I considered leaving even before this Farage shitshow. The living standard is low, you get far more for your money elsewhere, far superior housing, much better food, better service, better weather, cleaner streets, less crime, maintained cities. And I won't even start about healthcare. So I guess there's not much point in staying. I'll just sell up and go, voluntarily.
It was fun while it lasted. Despite everything, Brits (well, most of them) are cool people. Best of luck, if Farage gets in - you will definitely need it.