We had 70 years of CAA/ARB experience and an organisational structure to handle self regulation. We don't have that capability at the moment as it is all done by EASA. Whether or not the UK CAA can entice experienced people to leave EASA and help run the CAA again remains to be seen, but if they don't start manning up soon it will be a problem. Not just for pilots, Engineers and ATCOs will be in the same boat. As will everything else the CAA used to do.