Purely anecdotally, with our work in London my wife and I meet lots of EU people (excl UK), and every single one has been mentally preparing a Plan B should it all go wrong. There's already lots of movement as these plans are concocted I think. Every single one of these are white collar employees / self employed etc. The blue collar workers, about whom everyone seems most antagonistic, are ironically the ones most determined to stay on. I've no idea if planes will stop flying during this "s**tstorm". But the amount of distress to people's lives is already hideous