Motor Bridge UK | UK Motoring Guide
Whether you're heading away with a caravan, transporting equipment or towing a small trailer, preparation makes a difference.
Towing changes how your vehicle accelerates, brakes, turns and responds to the road. Understanding weight limits, driving licence entitlements and safety checks helps you make better decisions.
Explore our interactive guide for practical UK towing advice, legal requirements and an official DVSA safety video.
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01 | Before you tow
Before attaching a trailer, make sure your vehicle, towing equipment and driving licence are suitable for the combination.
Check the manufacturer's maximum braked and unbraked towing limits, together with the vehicle's gross train weight.
Gross train weight is the permitted combined laden weight of the towing vehicle and trailer.
You must not exceed applicable weight limits. Also check the limits of the towbar, trailer and coupling.
If a vehicle's identification plate does not specify a permitted train weight, GOV.UK advises that the vehicle should not be used for towing.
Maximum Authorised Mass, or MAM, is the maximum permitted laden weight of a vehicle or trailer.
It includes the vehicle or trailer itself and everything carried.
MAM is particularly important when checking driving licence entitlements and other legal restrictions.
For car drivers in Great Britain, the towing entitlement rules changed on 16 December 2021.
Drivers who obtained a full car licence on or after 1 January 1997 can generally tow a trailer with a MAM of up to 3,500kg, subject to their vehicle's limits and licence entitlement.
A separate car-and-trailer test is no longer required for that standard entitlement.
Drivers who passed before 1 January 1997 may have additional entitlement.
Always check your individual driving licence record before towing.
Heavier vehicles or trailer combinations may require additional licence categories.
Do not assume that category B or BE entitlement permits every combination.
Check your licence, the vehicle category, the trailer MAM and all applicable weight limits.
02 | Equipment and connections
A secure connection is essential. Small faults can become serious problems once the vehicle is moving.
Check that the coupling is correctly attached and locked, following the manufacturer's instructions.
Confirm the coupling height is suitable and the towbar is approved and compatible where required.
Check the jockey wheel is fully raised and secured before departure.
A breakaway cable or appropriate secondary coupling helps reduce the danger if the trailer separates from the towing vehicle.
On a braked trailer, the breakaway system is intended to apply the trailer brakes if separation occurs.
Check that it is undamaged, correctly attached, does not drag and has suitable slack.
Follow the trailer and towing-equipment manufacturers' instructions.
Check the electrical plug and cable for damage, corrosion or poor connections.
Test indicators, brake lights, rear lights, number-plate illumination and other required lighting.
Ensure the cable cannot drag on the road or become trapped during turns.
Trailers weighing more than 750kg when loaded generally require an effective braking system.
Any brakes fitted must be maintained in proper working order.
Check the applicable requirements for your trailer and have defects repaired before towing.
03 | Loading and stability
Incorrect loading can affect steering, stability, braking and the risk of trailer snaking.
Follow the trailer manufacturer's loading guidance.
As a general principle, place heavy items low down and close to the axle area, securing them against movement.
Maintain the recommended downward load on the towball without exceeding any permitted limit.
Avoid loading too much weight at the front or rear.
Noseweight is the downward force applied by the trailer coupling to the towball.
It affects towing stability and must remain within the applicable limits.
Check the limits specified for your vehicle, towbar and trailer. The lowest applicable limit must not be exceeded.
Use a suitable measuring device where necessary.
Loose equipment may move during braking, cornering or a collision.
Secure loads with suitable equipment and ensure nothing projects dangerously.
For caravans, secure cupboards, doors, windows, external lockers and movable equipment.
Check tyre pressures against the manufacturer's recommendations for the intended load.
Inspect for cuts, bulges, cracking and other damage.
For typical car and light-trailer tyres, the legal minimum tread depth is 1.6mm across the central three-quarters of the tread around the full circumference.
Tyre age can matter even when tread looks good. Inspect the condition and follow relevant manufacturer guidance rather than relying on a universal replacement interval.
Check wheel fixings and their specified torque where appropriate.
04 | Driving with a trailer
Towing changes the way your vehicle behaves. Allow more time, more space and more consideration for corners and road conditions.
A trailer adds weight and can affect braking performance.
Leave additional space from vehicles ahead and anticipate hazards early.
Avoid sudden braking where possible, particularly when cornering.
Reduce speed before bends and allow sufficient room for the trailer to follow the towing vehicle.
Take wider turns where necessary to avoid mounting kerbs or striking obstacles.
Always check mirrors and surroundings before manoeuvring.
If the trailer begins to snake or swerve, ease off the accelerator and allow the combination to slow gently.
Avoid sudden steering or harsh braking.
Stop somewhere safe and investigate the cause before continuing.
Possible causes include excessive speed, incorrect loading or unsuitable noseweight.
Practise in a suitable open area before travelling.
Reverse slowly, use small steering corrections and stop if you are unsure of your surroundings.
A competent person can help guide you from a safe position, but the driver remains responsible for the manoeuvre.
05 | Legal speed limits
For cars towing trailers or caravans in Great Britain, the national limits differ from those for cars travelling without trailers.
These figures apply to the standard car-and-trailer category. Lower posted limits take precedence, and other vehicle classes may have different limits.
Follow the applicable signed or default speed limit.
In England and Scotland, qualifying restricted roads generally have a 30mph default limit.
In Wales, the default on qualifying restricted roads is generally 20mph unless a different limit applies.
A speed limit is a maximum, not a target.
When towing a trailer, you must not use the right-hand lane of a motorway with three or more lanes open for traffic.
Follow lane-control signals and applicable motorway restrictions.
06 | Legal and practical requirements
You must have an adequate view of the road behind you.
Fit suitable towing mirrors if your caravan or trailer is wider than the rear of your car.
Check that mirrors are correctly adjusted and provide the required field of vision.
Do not assume every insurance policy provides the same towing cover.
Check your policy wording and contact your insurer if necessary.
Confirm cover for third-party liability, the trailer itself, contents, recovery and travel abroad where relevant.
Follow any insurer requirements concerning towing equipment or declared modifications.
A trailer must display the appropriate registration number plate for the towing vehicle when required.
Check applicable width and length restrictions, including any requirements for overhanging loads.
The maximum trailer width for a car in Great Britain is generally 2.55 metres.
For a towing vehicle with a MAM of 3,500kg or less, the maximum trailer length is generally 7 metres, excluding the drawbar or A-frame.
Commercial towing may involve additional operator licensing, drivers' hours, tachograph, weight or insurance requirements.
The rules depend on the vehicle combination, its use and the operation.
Some combinations and activities qualify for exemptions.
Businesses should establish the requirements that apply before operating.
07 | Interactive knowledge check
Three realistic towing situations. Choose your answer and reveal the explanation.
These examples are educational exercises rather than a formal assessment of towing competence.
Your trailer begins moving from side to side while travelling along a straight road.
Sudden braking can increase instability. Follow official towing guidance and avoid abrupt inputs.
Reduce speed gently and maintain smooth control. Stop safely and check the cause before continuing.
Increasing speed can make a developing instability problem more dangerous.
You're preparing to tow a caravan that is wider than the rear of your vehicle.
You must have an adequate view behind. Standard mirrors may not provide the required visibility.
GOV.UK requires suitable towing mirrors when the trailer or caravan is wider than the rear of the car.
A camera does not automatically replace the requirement for suitable mirrors and an adequate rearward view.
You're towing a caravan on a motorway with three open lanes.
Vehicles towing trailers must not use the right-hand lane of a motorway with three or more lanes open for traffic.
Follow the applicable speed limit and lane restrictions. Overtake only where permitted and safe.
The national motorway speed limit for cars towing trailers is 60mph, unless a lower limit applies.
08 | Your pre-towing routine
A practical checklist for every journey. Tick each item when you have completed the relevant checks.
Selections are temporary and are not submitted or stored by this guide.
09 | Official DVSA towing video
The Driver and Vehicle Standards Agency provides practical advice about basic safety checks before towing.
This is the original DVSA video included on your previous Motor Bridge page.
Opening the player may allow YouTube to process information about your visit under its own privacy policies.
Video: Driver and Vehicle Standards Agency (DVSA), via YouTube. Motor Bridge UK does not own the video. Copyright remains with the original rights holder.
If the embedded video is unavailable, you can view the official DVSA towing safety guidance using the link below.
View DVSA towing safety guidanceOfficial UK guidance
These official resources explain driving licence entitlements, weight limits, equipment requirements and safety checks.
Check what your driving licence permits you to tow.
View official towing licence guidanceUnderstand gross train weight, vehicle limits and trailer dimensions.
View official weight and dimension limitsCheck coupling, brakes, lights, tyres, loading and other safety essentials.
View official DVSA safety checksCheck the speed limits applicable to cars, goods vehicles and towing combinations.
View official UK speed-limit guidanceHighway Code Rule 98 explains important towing and loading responsibilities.
Read the Highway Code