The UK government has announced (via the BBC) that France is longer on England's "Amber+" list and has now been moved to Amber. That means, starting 4am on Sunday 8th August, fully vaccinated arrivals will no longer have to quarantine when returning from France.
Keep in mind that due to France's COVID restrictions, you can only visit if you're fully vaccinated. Children can travel with their fully vaccinated parents.
Remember, an Amber country is treated the same as a green country if you're fully vaccinated.