How would it roll if a British Airline established its main operating base in Dublin and tried to insist that only UK CAA Licenced pilots could apply for work in Ireland. Any attempt to do this would be physically stopped immediately...
You mean stopped by the common sense that no UK AOC would open a base in the EU, as they could only operate flights to UK?
Its time now for foreign airlines with their significant bases of operation in the United Kingdom to be required to have British AOC 's and for their United Kingdom based crews to have United Kingdom CAA Licences.
That would require the rewriting of the EU-UK TCA. I doubt that will happen.
There's only one cause of all of this mess. And plenty of British pilots voted both for the cause and the party who implemented it. Time for some home truths.