You can fly non-EASA aircraft on EASA PPLs using self declare medicals in the UK, see the 1441 table of combinations mentioned below.
As for allowing EASA PPLs to use LAPL medicals (whether a time induced downgrade or just getting a LAPL medical), and changing the rules to allow that across the EASA states (eg: flying UK-France), it seems EASA have had far too busy telling us they completely understand GA's problems, have a roadmap to sort things out for the better, and a cartoon, and after 5.5 years, somehow didn't get round to get useful hobby SEP things passed by the politicians by the April 2018 date, when it would have been really useful. The UK CAA have done much more than many thought possible this year to mitigate to give more time, but it isn't a European wide mitigation or complete, albeit very welcome.
So, knowing you have an EASA PPL-SEP...
(a) the EASA change to allow EASA PPLs to pretend to have LAPL privileges if accompanied by a LAPL medical is still 'sometime this year' by rumour. Until something changes, an EASA PPL cannot use a LAPL medical at all... even to fly non-EASA aircraft.... but they can use a UK self declaration subject to listed restrictions due to the exemption (1260) mentioned below, which don't help you if you want to fly to France. The licence/medical combinations prior
to recent 2018 CAA mitigation is here http://publicapps.caa.co.uk/docs/33/CAP1441_MedicalLicenceTable_V10(08March2017).pdf
and as you can see, EASA PPL plus lapl medical doesn't work for either easa or non-easa aircraft. This table is then further amended for you by the later general exemption ors4 1260 which allows flying EASA aircraft with your EASA ppl on a self declare medical: https://publicapps.caa.co.uk/docs/33/1260.pdf
- but note the restrictions in para 4.iii which don't help you on an EASA PPL-SEP to fly in France.
(b) flying non EASA SEP aircraft... Without foreign CAA permission, you would need some combination that is ICAO compliant or that is EASA compliant to fly to France from the UK. The PPL-SEP-selfdeclare is neither of those, neither is PPL-SEP-LAPL medical (yet), but will be 'sometime', and when it does, it will fit the EASA compliant bit, we hope.
If you are not going to France yet, why not use the self-declare exemptions in the UK and wait, only getting a Class 2 at the last minute if the 'using a lapl medical' change hasn't arrived.
Irv Lee - (R/T & Flight Examiner)
Deconfusion & Preflight Aide-Memoire: http://tinyurl.com/pilotpal
UK GA Twittering not Tw@ering: @irvleeuk