Can anyone point me to a reliable site regarding the French quarantine arrangements.
With the caveat that 6 weeks is a long time and things could, indeed probably will, change it looks as though it will be worth an attempt to visit at the end of July/beginning of August and that I will be able to exempt myself from quarantine on return to the UK - though the devil will be in the details I expect.
The UK side has a (lengthy) online form to fill in with spot checks at the ports depending on how busy they are that you have complied (£100 fine if not).
What do you have to do to declare yourself to the French and how strict is the isolation needed (could I go shopping to get food, for instance).
As an aside the UK regulations are pretty draconian and the fact that it has been done by Statutory Instrument rather than primary legislation worrying to some observers.
Analysis here, if you are interested.