Towing a trailer, caravan or plant machinery in the UK is governed by your driving licence category, the weight of your vehicle and trailer combination, and a set of trailer safety rules that catch out a lot of otherwise careful drivers. Getting it wrong is not just a paperwork issue — an overloaded or badly matched combination is genuinely dangerous.
The rules have changed more than once in recent years, most notably in December 2021, so what a friend or relative could legally tow a decade ago is not a reliable guide to what you can tow today. This guide sets out the general principles, but licence rules are detailed and exceptions apply, so always check the current position on GOV.UK or with the DVLA before towing anything you are unsure about.
We also cover when it makes more sense to book a professional transporter rather than tow something yourself — often the safer, less stressful, and ultimately cheaper option for one-off or unfamiliar loads.
What your licence category allows
Your entitlement to tow a trailer depends on when you passed your car test and which licence category you hold. Drivers who passed their test before 1 January 1997 generally retain broader towing entitlement under category B, covering larger combinations than those who passed later.
Drivers who passed their test from 1 January 1997 onward were, until December 2021, restricted to smaller combined weights under category B alone, with a separate B+E test required for anything heavier. That B+E requirement was removed for many drivers in December 2021, but the exact detail depends on individual circumstances, so checking your specific entitlement on GOV.UK before towing is essential rather than optional.
- Category B — car licence, covers towing up to certain combined weight limits
- Category B+E — historically required for heavier trailer combinations
- December 2021 rule change — altered what many category B licence holders can tow without a separate test
- Entitlement can vary by individual test date and licence history
- Always confirm your exact entitlement via GOV.UK or the DVLA rather than relying on general guidance
Understanding MAM and combined weight
MAM stands for Maximum Authorised Mass — essentially the maximum weight a vehicle or trailer is legally permitted to be, as set by the manufacturer, not the weight it happens to be loaded to on a given day. Licence rules generally work off the combined MAM of the towing vehicle and the trailer together.
This means the limiting factor is not just how heavy your trailer looks, but the sum of your vehicle's MAM and the trailer's MAM — a heavy tow car with a light trailer can still add up to a combination near or over a licence limit.
Noseweight and trailer safety
Noseweight is the downward force the trailer's coupling exerts on the tow ball, and getting it wrong — too light or too heavy — makes a trailer unstable, prone to snaking at speed. Most tow vehicles and trailers have a maximum noseweight figure, and loading a trailer to get within that range, with more weight forward of the axle than behind it, is basic trailer safety.
Alongside noseweight, tyre condition, correct trailer lighting, a secure coupling with the breakaway cable attached, and a properly rated tow bar all matter more on twisting Cornish roads than they might on a flat, straight motorway run.
- Check noseweight against both the vehicle and trailer maximums
- Load heavier items low and slightly forward of the trailer axle
- Confirm the breakaway cable or secondary coupling is correctly attached
- Check trailer tyres, lights and the coupling before every journey
- Fit and use towing mirrors where the trailer is wider than the tow vehicle
Unbraked trailer limits
Unbraked trailers — common for smaller loads like a single quad, small camping trailer or light plant — have their own weight limits, generally lower than braked trailers, and are usually capped at a proportion of the towing vehicle's kerbweight as well as an absolute limit. Exceeding an unbraked trailer's limit is both illegal and a genuine safety risk, since the trailer has no independent braking to help slow the combination.
If you are unsure whether your trailer is braked, has working brakes, or falls within the unbraked limit for your vehicle, check the trailer's data plate and your vehicle handbook, or ask before towing.
When self-towing is not the right call
Plenty of towing jobs are entirely legal and safe to do yourself, given the right licence and a well-matched combination. But there are situations where booking a professional transporter is the more sensible choice, even if you technically could tow it.
- You are unsure of your exact licence entitlement for the combined weight involved
- The trailer or load is unfamiliar and you have limited towing experience
- The route includes narrow lanes, steep gradients or difficult reversing
- Your tow vehicle is not rated or equipped for the trailer's weight
- The load is a one-off — a professional transport service avoids buying or hiring towing kit for a single job
Getting it checked before you tow
None of this replaces checking your own specific position. Licence categories, weight limits and towing rules have detail and exceptions that go beyond a general guide, so GOV.UK and the DVLA remain the correct source for confirming exactly what you are entitled to tow.
If, after checking, towing yourself is not practical or you would simply rather not, booking a professional transport service removes the licence question entirely and puts the load in the hands of an operator already equipped for it.
Need this sorted today?
Not confident about towing it yourself? Book a professional transporter and remove the guesswork.
Frequently asked questions
How do I find out exactly what I'm allowed to tow?
Check your driving licence categories and entitlement details on GOV.UK, or contact the DVLA directly. Your test date and licence history both affect the answer, so a general rule of thumb is not reliable for your specific case.
What changed with towing rules in December 2021?
The change altered what many category B licence holders could tow without sitting a separate B+E test, but the detail depends on individual circumstances. Confirm your own entitlement on GOV.UK rather than assuming the general summary applies to you.
What is noseweight and why does it matter?
It is the downward force the trailer's coupling puts on the tow ball, and getting it wrong makes the trailer unstable at speed. Loading the trailer correctly, with the manufacturer's noseweight range in mind, is basic towing safety.
Can I tow a small trailer with no brakes?
Unbraked trailers have their own lower weight limits, generally tied to your vehicle's kerbweight, so check the trailer's data plate and your vehicle handbook before assuming it is within limits.
Is it ever better to just book a transporter instead of towing myself?
Yes, particularly for a one-off job, an unfamiliar trailer, or a route with difficult access. It avoids licence questions, towing equipment costs and the stress of an unfamiliar combination.
Does my caravan count differently to a general trailer?
Caravans are treated as trailers for licence and weight purposes, so the same MAM and licence category rules apply. See our separate caravan breakdown guide for what happens if a caravan itself develops a fault.
Services covered in this guide
Related guides
Trailer, Caravan and Plant Transport
Booked, planned transport for trailers, plant and small machinery — separate from an emergency breakdown recovery.
ReadCaravan & Trailer Breakdowns
An outfit is two vehicles, and the recovery plan depends entirely on which one has failed.
Read3.5 Ton vs 7.5 Ton Recovery
One number on your V5 decides which truck comes. Here is where to find it and why it matters.
Read