Do not allow a distance of more than 4.5 metres (about 15 feet) between the vehicles or the vehicle and the trailer.
If more than 1.5 metres separates the vehicles, use some warning device such as a white flag of at least 30 centimetres squared to draw attention to the tow bar.
If you need to tow another vehicle using a rope or strap – for example, a broken down vehicle – you should only do so to the nearest convenient safe place of repair.
If towing a vehicle that has its own steering gear, make sure somebody remains in that vehicle to take charge of the steering.
If towing a vehicle, the person who steers the towed vehicle must hold a licence to drive the same category of vehicle.
Make sure a trailer is fitted with brakes if it has a Maximum Authorised
Mass (MAM) of more than 750kg or is more than half the laden weight of the drawing vehicle (whichever is lower). This includes a parking brake and a breakaway brake. Older trailers that don’t have a breakaway brake must have a secondary coupling (a chain or wire rope) fitted instead.
A combination of vehicles or an articulated vehicle more than 13 metres long must display a ‘LONG VEHICLE’ sign or signs on the back of the last trailer.