In reply to simon manc:
just come back from uk >france>switzerland>france> uk on Sunday. You need proof of double vaccination for anywhere you want to eat or drink out in France, Switzerland-no. if not double vaccinated, you'll need a recent french test i think (unsure of this). French were very strict about this. NHS QR code works fine though. Masks still needed in supermarkets etc
you now need UK sticker rather than GB on your vehicle.
don't think we did anything for getting into switzerland, though there may actually be some paperwork we should technically have completed, no one checked, i only realised we hadn't done this after leaving switzerland!
Went out on eurotunnel and uploaded vaccine proofs on their website on the way out so we only got passport checked and that's it.
on the way back, as of Monday, you don't need to test in france before coming back to UK, only day 2 test in UK (we ordered an online kit to be sent to the house and got our results super quick).
and you need to complete passenger locator form before coming back to UK, bit of an annoying form online, but fairly easy.
*edit- we didn't need to do any tests to get into france, just vaccine status
Post edited at 15:37