That's wishful thinking.
Even If the Brexit will happen (And I do hope it will), the UK CAA will continue to be part of EASA or at least follow EASA guidelines because that will be the easiest thing to do for them.
It seems that I can't get a straight answer from anyone nowhere. I'm still trying to understand which part of part-NCC which suppose to be dealing only with operating a non commercial complex aircraft suddenly became a limitation to 3rd country pilots ?
Or in the words of someone I just spoke to in the FAA ".. one of those sleek bastards manged to sneak this in under our noses..."