They get a ticket.
If a British driver is caught speeding on camera in France, nothing or nearly nothing happens. If the same driver is stopped by the police for speeding, he will be fined on the spot (a fine of 90
Your driver's license will be suspended and the next time you are stopped you will spend some time in jail.
You are at fault. As a licensed driver you are responsible to look for and avoid all potential hazards on the road.
Speeding up
If stopped or in an accident they will be arrested and the vehicle will be impounded. This is the only answer I can give you.
If they are stopped your car could be impounded. If they get into an accident you are responsible for damages of your car and the other person's car. Not worth letting them drive.
He gets an insurance discount.
You must be licensed to drive, or have a permit and a licensed driver with you. Otherwise, there are legal consequences for that driver. The insurance company may not pay for any damages depending on the policy.
Same as any other car. The ticket is issed to the DRIVER - not the CAR.
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You have to drive with a licensed Driver.
Driver licenses are not required as a condition of car ownership. However, you will need a licensed driver to deliver the car to your garage from the place of swap or purchase. You will need a licensed driver thereafter, or to obtain your own driver license, in order to use the car for your personal transporatation needs.