The real fun were the British immigrants( who of course called themseves ex-pats) who lived full time in Spain. Most were retirees that migrated to avoid taxes and extend their retirement funds.
After Brexit, Spain said "okay, you have a year to file as a permanent resident/citizen and setup a tax ID, or you will require a Visa."
So of course, a lot of them didn't follow the new law and were summarily ejected from Spain to Britain. This includes people who owned homes in Spain, and had no legal residences in Britan. They then needed to file for Visas to go back to Spain, and apply for citizenship the long and hard way, which is not guaranteed.
Can you guess how many of them were saying they would never have voted for Brexit if they knew it would affect their immigration status too?