Using a hand-held mobile phone while you're driving is illegal. Driving requires all of your attention, all of the time. Any distraction, however brief, is potentially dangerous and could affect your control of the vehicle. Even using a hands-free system will distract you. The only safe way is to switch your phone off and make or pick up calls when you stop for a rest break.

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

You must be medically fit to drive. All issues relating to alcohol, drugs or health have to be reported to the DVLA Drivers Medical Group or, in Northern Ireland, the DVA Drivers Medical Section. If a licence is revoked for any health-related reason, you must reapply to the relevant medical branch and satisfy them that you're now fit to drive before they'll issue the appropriate licence for the category you require.

If an ADI is charging for a driving lesson, they must display their ADI certificate and appropriate L or D plates on the tuition car.

Drivers and passengers must normally wear seat belts. However, a driver may remove their seat belt when carrying out an exercise that involves reversing; this also applies to driving instructors while supervising such manoeuvres.

Photocard licences have to be renewed every 10 years until the age of 70. This is to make sure that the photograph is a good likeness of the licence holder.

Only use your fog lights when visibility is seriously reduced. Use dipped headlights at other times when visibility is poor. Your headlights and tail lights help others on the road to see you. It may be necessary to turn them on during the day if visibility is reduced; for example, due to heavy rain.

Fog lights should only be used when visibility is seriously reduced. They must be switched off when visibility improves, to avoid dazzling other road users.

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.

Driving a vehicle without insurance cover is illegal. If you cause injury to anyone or damage their property, it could be very expensive and you could also be subject to criminal prosecution.

Drivers mustn't park or drive in a cycle lane that's marked by a solid white line during its periods of operation. At other times, when the lane isn't in operation, you should be aware that there may be cyclists in the area.

The maximum permitted speed for a car on a motorway is 70 mph, but if a car is towing a caravan or trailer, the speed limit is reduced to 60 mph. Also, vehicles towing trailers may not use the right-hand lane of a motorway that has more than two lanes.

You must inform the Driver and Vehicle Licensing Agency (DVLA), or the Driver and Vehicle Agency (DVA) in Northern Ireland, about any health condition likely to affect your driving. They'll investigate your condition and how it affects your ability to drive; they may not take away your licence.

Child passengers should be encouraged to fasten their seat belts themselves from an early age, so that it becomes a matter of routine. It's the driver's responsibility to check that the seat belts of any passengers under 14 years old are fastened securely.

A person who's colour-blind will have to take exactly the same practical driving test as any other candidate. No restriction will be placed on their driving licence when they pass their test.

If your pupil makes a minor error when carrying out a reversing exercise, even during their driving test, it's acceptable to correct the problem before it develops into a serious fault. The correction must be carried out safely.

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.

If your vehicle is stationary, only sound the horn if you think there's a risk of danger. Don't use it to attract attention. This causes unnecessary noise and could be misleading to other road users.

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.

Where there are extra hazards such as roadworks, it's often necessary to slow traffic down by imposing a temporary speed limit. The speed-limit sign will be circular and edged with a red ring. This tells you that the sign is an order and you must obey it.