Officers who stopped a car seen swerving over County Road discovered the driver was a 17-year-old boy being taught by his dad.

But the vehicle wasn't displaying L plates and the pair had not sorted out the correct insurance before setting out on May 21, said police.

Now the Wiltshire force has warned others to make sure they follow the law when teaching friends or family to drive.

PC Luke Hobbs, from the roads policing unit, said: “Teaching someone to drive or supervising a learner is a big responsibility and people need to ensure they have done their research so they can be confident they are carrying out these duties safely and lawfully. Please make sure you have all the documentation in place before you allow your teenager or any other learner driver to get behind the wheel of your car.”

The teen and his dad have been reported to court.

Adults must be over 21 and qualified to drive the same car as the learner. They need to have had a full UK driving licence for at least three years, meet the minimum eyesight standards and not be paid to supervise the learner.

Learners must be at least 17, hold a provisional UK licence. Supervisors must have an insurance policy that covers them and the learner and the vehicle must display L plates.