Icarus2001 My pleasure with the reply. In terms of the "exit payment", UK is merely agreeing its contractual obligation to pay its share of the MFF (Multi-Annual Financial Framework - budget) up until the end of the seven year term, on 31 December 2020.
In terms of UK CAA being a competent authority for the purpose of certification in its own right and recognised by FAA and EASA, this is not presently the case. As Denti points out below, it will take a few years (and a substantial budget) to reach this situation.
Denti I agree your post and emphasise your point that if UK remains in the single market as an EFTA EEA member with a Customs Cooperation Agreement rather than currently as an EU EEA/Customs Union member, the nation would be free of EU political control, the ECJ, would dump 73% of the EU acquis, retain 27% (which is the stuff handed down to EU by world standards bodies), maintain regulatory alignment, continue to enjoy free trade, Aerospace/Air Transport regulatory alignment plus a host of other huge benefits we all take for granted. However, in late 2016, Theresa May and her Rasputin like advisor Nick Timothy decided between themselves, on behalf of a grateful nation, to take the present course that will ultimately plunge us all over the cliff edge on 29 March 2019, rather than a course that will lead to an extremely bright future in EFTA/EEA, continuing to enjoy membership of the single market and substantially solving the Ireland/Norther Ireland border conundrum . Thanks guys, great job!