When driving throughout Europe there are a number of legal requirements for items that must be carried within your vehicle
Country specific legal requirement table for Europe

Don't go without taking:

• Spare set of car keys
• Fire extinguisher, first aid kit, tool kit, spare bulbs
• Warning triangle
• your registration document, driving licence and passport- check if you’ll need an International Driving Permit
• UK motor insurance certificate, Green Card (if issued)
• Breakdown policy and contact numbers
• Travel insurance documents
• Emergency helpline numbers

Whilst you’re away:

• Drive defensively and expect the unexpected – the local driving style may be different to that of the UK
• Don’t drive when you’re tired and take regular breaks on long journeys
• Always wear a seat belt and make sure other passengers do to
• Don’t drink and drive – the alcohol limit may be lower than in the UK and in some countries there is zero tolerance for drink driving
• Don't use your mobile whilst driving
• Don’t overload your vehicle and ensure you can see out of the back window
• If you’re involved in an accident, contact your insurer immediately and take photographs of damage to your vehicle

Driving your own car

• You should have a GB sticker clearly visible on the back of your car. You’ll also need headlamp converters if you’re driving on the right-hand side of the road. You will also require fire extinguisher, first aid kit, tool kit, spare bulbs and a warning triangle depending on Countries you plan to travel through.

France