Beware of the restrictions that you will find in France.
You need a “Covid Passport” (“Pass Sanitaire”) to enter restaurants (even Fastfood), bars, museums, etc.
What is that? Basically a QR code that gets scanned upon entry. It can contain either “double vaccinated” status, Negative Test, or recently recovered from Covid. The French accept the UK certificates but it must be a QR code (because it gets scanned upon entry to facilities!!!)
This is from an Ex-pat site in France at the middle of August 2021: https://anglophone-direct.com/pass-sanitaire-who-what-where-when-how/
Have fun,
Cheers Uki
P>S> similar rules re entry to restaurants, museums etc apply to Italy!