Estimated read time: 4 minutes
“Do you legally have to cover your trailer in the UK?” is one of the most common questions we get asked and the honest answer is a little more nuanced than a straight yes or no. Here’s what the law actually says, and why a good cover is usually the simplest way to stay on the right side of it.
The actual legal requirement
The relevant rule isn’t a specific “covers must be used” law, it’s Regulation 100 of the Road Vehicles (Construction and Use) Regulations 1986, which puts the responsibility on you, the person towing:
The load carried by a motor vehicle or trailer shall at all times be so secured, and be in such a position, that neither danger nor nuisance is likely to be caused by reason of the load or any part of it falling or being blown from the vehicle, or by any other movement of the load.
In plain terms: whatever you’re hauling has to stay on the trailer and stay in place – nothing falling off, nothing blowing off, nothing shifting around dangerously. Failing to do this can be treated as an offence under the Road Traffic Act 1988, and DVSA roadside checks do enforce it.
So is a cover actually required?
Official government guidance takes a risk-based approach rather than a blanket rule: covering a load prevents it bouncing or blowing out on the road, but where a load sits below the trailer’s sides, a cover may not always be strictly necessary – it’s down to the person loading the trailer to assess the risk and be able to justify their decision if challenged.
In practice, that means:
- Loose or granular loads – sand, gravel, soil, aggregate, garden waste, general debris – should essentially always be covered. Loose material blowing off at speed onto the road behind you is exactly the scenario the regulation is written to prevent, and it’s one of the most common reasons DVSA issues prohibitions at roadside checks.
- Solid, secured items – machinery, furniture, equipment – may be adequately restrained with straps or ratchets alone, but a cover still adds protection against weather, theft, and general wear, even where it isn’t strictly the only way to comply.
- If in doubt, cover it. A cover is the simplest, lowest-effort way to demonstrate you’ve taken the risk seriously, and it solves the weather and security question at the same time.
Why this matters beyond just avoiding a fine
Getting stopped with an insecure load doesn’t just risk a penalty – DVSA can issue an immediate prohibition, meaning your trailer is off the road until it’s fixed, wherever that happens to be. For anyone using a trailer for work, that’s lost time on top of any fine.
A well-fitted, heavy-duty cover addresses the legal requirement and protects the load from weather and damage in one go – which is really the whole reason it’s worth getting a cover that actually fits properly, rather than treating it as an afterthought
