There's an eyesight test for the Register of Approved Driving Instructors. The requirement is that an instructor must be able to read a number plate with letters and figures 79 mm high and 50 mm wide at a minimum distance of 26.5 metres (87 feet). This is a greater distance than the minimum legal requirement for car drivers.

When a physically disabled driver passes their driving test in a specially adapted vehicle, the licence issued will include restrictions. These will require the necessary modifications to be fitted to any vehicle they drive.

A candidate must be able to read a modern-style number plate (made after 1 September 2001) from 20 metres. If the candidate's eyesight isn't up to the required standard, the test will go no further and they'll have failed.

Subject to the candidate's permission, instructors are encouraged to accompany their pupils on their driving test and also to listen to the examiner's debrief. If they haven't been present during the test, instructors are advised to be available to listen to the examiner's debrief at the end of the test.

Anyone who accompanies a learner driver on a driving test must be at least 16 years old and must wear a seat belt. (This includes a person who holds a seat-belt exemption certificate.) The accompanying driver mustn't take any part in the test. The examiner can end the test if they feel any inappropriate communication has taken place.

One condition of holding a driving licence is that you must inform the Driver and Vehicle Licensing Agency (DVLA), or the Driver and Vehicle Agency (DVA) in Northern Ireland, if your health deteriorates in any way that affects your ability to drive. This also applies if your eyesight deteriorates to the point that you can no longer meet the driver's eyesight requirements.

Any more weight than this will take the vehicle into a different category, therefore making it unsuitable for a category B driving test.

Always switch off the engine, remove the key and lock your car, even if you're only leaving it for a few minutes.

You must stop if you've been involved in a collision that results in any injury or damage. You must also be able to produce your driving licence when a police officer asks to see it. If you can't do this at the time, you may be asked to take it to a police station within a certain period. You may also be asked to show a valid insurance certificate and a valid MOT certificate.

When parking, all ancillary controls should be switched off and the engine stopped. Make sure that the handbrake is applied firmly before leaving the vehicle.

The lowest level of insurance cover you must have to drive on public roads is third-party liability. The third party is anyone you might injure or whose property you might damage. With this minimum level of insurance cover, you're not covered for any damage to your vehicle or injury to yourself.

If your vehicle requires an MOT certificate, it's illegal to drive it without one. As well as being illegal, the vehicle may be unsafe for use on the road and your insurance may be invalid.

Where fitted, seat belts must be worn. It's the driver's responsibility to ensure that children under 14 years old wear a seat belt or use a suitable child restraint. Passengers aged 14 or over are responsible for wearing their seat belt. Exceptions to this law are made for people who hold a medical exemption certificate.

Before you drive a vehicle on the road, you must hold a driving licence for the class of vehicle being driven. You must also be covered by a minimum of third-party insurance while driving that vehicle.

Passengers over 14 years old are responsible for wearing a seat belt when travelling in a vehicle, unless they're exempt. A responsible driver will make sure that passengers have fastened their seat belts before setting off.

The extended test takes about 70 minutes and is assessed to the same level as the standard driving test for learner drivers.

Dual accelerators aren't normally fitted to training vehicles. If one is fitted, it must be removed while the vehicle is being used for a driving test.

Sometimes an insurance company will issue a temporary insurance certificate called a cover note. It gives you the same insurance cover as your certificate, but lasts for a limited period, usually one month.

Parking near a pedestrian crossing creates an obstruction that prevents both drivers and pedestrians from having a clear view. Careless parking is selfish and could endanger other road users.

If your pupil's driving is below the required test standard, it's your responsibility as a professional instructor to advise them not to take the test. As soon as you become aware of a possible problem, you should discuss this with your pupil and positively encourage them that, in their interest, and for other road users as well, it would be far better to postpone the appointment. If you can't dissuade them, then you should withhold the use of your vehicle. Ultimately, it's the pupil's test and an instructor can't prevent them from taking it in someone else's vehicle.