When are towing mirrors required?

Highway Code rule 98 says if your vehicle is narrower than your trailer or load, or your trailer or load obstructs your rearward view, then towing mirrors must be used. GOV.UK's equipment page, checked in 2026, says you must have an adequate view of the road behind you, and to fit suitable towing mirrors if the trailer or caravan is wider than the rear of the car. Width is the usual trigger. A high load that blanks the interior mirror can be the other trigger even on a narrow trailer.

The test is the view, not whether extension mirrors look excessive from the pavement. If you cannot see along the side of the van and the road behind it, the view is not adequate. Interior mirrors that show a slice of caravan wall do not fix that. Door mirrors that see only the caravan sides do not fix it either. The extra glass has to see past the van.

GOV.UK publishes a maximum fine of £1,000 and 3 penalty points for towing without proper towing mirrors. That is a specific published tariff, separate from the £2,500 dangerous-condition figure on the same page. A prohibition can also stop the outfit until mirrors are fitted. The points are enough to matter for a new driver, who loses the licence at 6 points in 2 years.

The MOT on the car checks car mirrors, not the clip-on towing pair you left in the garage. The offence is using the combination without an adequate view. Fitting mirrors at the site after you have driven 40 miles without them does not undo the miles already driven.

Use mirrors meant for towing, fitted as the maker describes, so they stay put at 60 mph. Sit in the driving seat and confirm you can see along both sides and a useful slice of the road behind. Adjust after the van is hitched, because hitch height changes the picture. Remove them when you are not towing if they stick out further than the car, because a walk-past in a car park is how they get knocked and then fail on the next trip.

Rule 98 also says carrying a load or pulling a trailer may require you to adjust your headlights. Mirrors are the view back. Lamps are the view forward. Do both when the van goes on.

A trailer narrower than the car still needs extra mirrors if the load or the trailer body blocks the view behind. A box that sits high on a narrow chassis is the usual example. A van towing a van-bodied trailer is often wider than the towing van at the rear. The same width test applies. Motorcycle towing has its own view rules. This page is the car towing GOV.UK rule.

Hire caravans are frequently wider than hire cars. The hire desk does not always supply mirrors. Buy or borrow a pair before you leave. Foreign cars in GB still have to have an adequate view on GB roads.

Rule 98 and the GOV.UK equipment page are GB sources. They apply in England, Scotland and Wales. Northern Ireland has its own Highway Code text. The idea of an adequate rearward view is not a Welsh or Scottish extra. The published £1,000 and 3 points are the GOV.UK GB figures.

Maximum trailer width remains 2.55 metres on the weights page. Mirrors do not let you exceed that width. They let you see past a legal width that is still wider than the car.

That extra mirrors are only for huge twin-axle vans. Width past the car is enough. That the car's large door mirrors count. They have to see past the trailer, not at it. That a camera is a published legal substitute. GOV.UK and rule 98 talk about towing mirrors and an adequate view. This page does not invent a camera exemption.

That you can fit them 'if you get stopped'. The offence is the journey without the view. Fit them before you pull out of the site.

Highway Code rule 98 says if your vehicle is narrower than your trailer or load, or your trailer or load obstructs your rearward view, then towing mirrors must be used. GOV.UK's equipment page says you must have an adequate view of the road behind you, and to fit suitable towing mirrors if the trailer or caravan is wider than the rear of the car. The same page publishes a maximum fine of £1,000 and 3 penalty points for towing without proper towing mirrors.

That tariff is specific. It sits next to the £2,500 dangerous-condition figure, which is a different offence. A new driver should treat 3 points as halfway to a revoked licence. The MOT on the car will not inspect clip-on towing mirrors left in the garage. The offence is using the combination without the required view. Fit them before you pull out, not after the first close pass.