When driving a UK-registered, right hand drive car, in France, or any other European mainland country. It is a legal requirement to ensure your car is road legal. If your headlights point towards the left kerb as they do in the UK, then in Europe you will be a hazard on the roads and could cause an accident by dazzling oncoming drivers.
If you have a standard UK beam pattern (with a left kerb bias) then headlamp beam deflectors must be fitted to comply with European law.
The consequences of not using headlamp beam deflectors can include on-the-spot fines and even more serious it can/will invalidate your cars insurance.
If you are going to live abroad and use your car permanently the car will fail the MOT with an incorrect beam setting.
To comply with French regulations, you can purchase headlamp beam converters from the link below.
These deflectors are designed to redirect the headlight beam of your vehicle so that they don't dazzle drivers on the opposite side of the road.
It's important to ensure that the headlamp converters you choose are suitable for your specific make and model of car, and that they are fitted correctly before you travel.
The Eurolite beam deflectors we recommend are universal and fit virtually every make and model of car on the roads today. They come with full fitting instructions.
It isn't so simple nowadays as in the past all cars needed them. With some modern cars having switchable headlights or adaptive headlights it isn't so clear cut anymore. Read my post "Does my car need headlamp beam deflectors?
In summary, if you are driving a UK-registered car in France, it is a legal requirement to use headlamp beam deflectors to avoid dazzling other drivers on the road. Failure to comply with this regulation can result in fines from French police or worse cause an accident.