Anti covid app
Not strictly aviation related but If travelling to France, I can recommend downloading and using the Tous AntiCovid app. You can scan your NHS certificate into it, and then you can show the certificate at bars, restaurants, border control etc… in France. If you use the app at border control they may ask you if you are resident, which is what happened to both myself and my daughter. If you are not just say no. If you say yes they will then start asking about permit de sejour etc…
also there are some places in France where one must use a medical disposable mask as opposed to a fabric one.