Muddling through
Sorry to say, as a South African I've experienced much more dramatic political changes - and they did not make that much difference to daily life.
Having observed the Brits from long before I came to live here, it's clear that most Brits like to keep things the way they always were.(and both sides of the Brexit argument are a demonstration of that - the core argument seems to be how far back the clock should be wound).
So I won't be surprised if post-Brexit UK is much the same as it has always been. And probably still complaining about us Bloody Foreigners as a group while being perfectly friendly on a personal level...