As a passenger, it is your responsibility to ensure you are familiar with the entry rules and requirements for France and country(ies) through which you are travelling, prior to your departure.
Entry requirements can change at short notice, so it's important to check information from relevant authorities to ensure you have all you need to travel. For passengers travelling on a full 'British Citizen' passport from the UK, more information on entry requirements can be found on the FCDO website here. Non-British passport holders should obtain up-to-date advice on entry requirements from the Embassy, High Commission or Consulate of your destination or country(ies) through which you are travelling.