Speaking as a 'remainer', I was sorry when the 'Brexit' vote was won, but democracy is democracy and my side lost. Still, only a twit couldn't see that there were good arguments on both sides, it's all about value judgements. I now watch the state of my country of birth with interest, currently it's a dogs' breakfast, and whilst this is in large part pandemic related, 'Brexit' is still having an influence. If one gets an earache ('Brexit' ) and then one gets a toothache (pandemic) which is far worse, one still has an earache, one just doesn't notice it so much.
So now I think what has to happen is that the great British public has to stop worrying so much about eating a dead bird in a couple of months' time and the price of kippers, and start about the business of rebuilding the economy in its' new and some would say improved format. Get out there and pick some fruit (thirty quid an hour's not bad), learn to drive a lorry, and get used to it.
We're still Europeans, forget the principles behind 'Brexit', the heavily subsidized milk has been spilt, it's all about economics, now, and it will, as I've mooted before, sort itself out, and the sooner the better.
As regards Poland, this raises the ever vexed question of how far a central governing body should impose its' generally held principles on national governments. Anything which works against equality and racial integration is anathema to me and to many others, but nations will do as they will, and if Poland doesn't tow the line, they can always, as others have suggested here, be kicked out of the club.