We are probably in for another migration of Brits to Canada, the last lasted from 1988 to 1996, it comprised mainly of Welsh, North English and Scots fleeing the Thatcher Economy.
The coming one could be far more substantial, Brexit is a colossal failure that gets worse with time. So much for the international trading hub, no other country wants to do business with a nation that reneged on it's most lucrative trade deal. The proof is in the ports, Hamburg's is booming while Bristol (which serves the Midlands) is boarded up. The UK can apply for re-entry into the EU but that too is problematic. Since the UK departed the EU, the Mediterranean economies have been prospering.