As the UK CAA is required to not only pay its own way but make a return on capital employed, the entire financial burden of re-creating a regulatory body to replace EASA would fall upon 'industry'. Don't expect the airlines or big airports (if we have any of either left when the likes of easyJet depart these shores) to pay for regulating GA, especially recreational flying. They used to - as an example Aerodrome Licensing where the likes of Heathrow and Gatwick used to subsidise small licensed grass airfields.
The UK has had a major input into EASA rulemaking and we're just seeing some stability returning to the industry. We need to be in a position to continue to influence and rein in the excesses of some of our partners.
TOO