Towing a mini digger and trailer is something a lot of our customers ask us about, and the rules in 2026 are simpler than many people realise. If you passed your car driving test on or after 1 January 1997, you can tow a trailer with a maximum authorised mass (MAM) of up to 3,500kg behind a standard category B vehicle, without needing to take any additional towing test. That change came into force on 16 December 2021 and has stayed the same since. The detail still matters though, because licence entitlement is only one part of the picture, and getting the weights wrong can land you in trouble even if your licence is in order.
Before December 2021, drivers who passed their test after 1 January 1997 had to sit a separate B+E practical test to tow anything substantial. That requirement was removed by The Motor Vehicles (Driving Licences) (Amendment) (No. 5) Regulations 2021. The DVSA was running around 30,000 B+E tests a year, and scrapping the test was partly aimed at freeing up examiners for HGV testing during the driver shortage at the time.
In practical terms, anyone who has passed a UK car driving test since 1 January 1997 is now automatically granted B+E entitlement. The DVLA updates licence records, and the BE category is added to your photocard when you next renew it. If your photocard still says B only, you can check your full entitlement on the GOV.UK ‘view driving licence‘ service.
For drivers who passed before 1 January 1997, nothing has changed. You retain your existing grandfather rights, which generally allow a vehicle and trailer combination up to 8,250kg MAM.
For most homeowners and small contractors, towing a mini digger and trailer means staying under the 3,500kg combined trailer MAM limit that comes with a standard category B licence. The MAM is the maximum the trailer is rated to weigh once it has a load on it, not the weight of the digger alone.
Here is where it gets practical. A typical 1.5 tonne mini digger weighs around 1,500kg. A plant trailer built to carry it is often rated at 2,700kg or 3,500kg gross. A 1.5 tonne digger on a 2,700kg trailer comes in well under the limit. A 3 tonne digger, which can weigh anywhere from 2,800kg to over 3,000kg depending on the make, is a different conversation entirely. Once you add the trailer, you are very likely over the 3,500kg trailer MAM limit, and at that point the simplest option is usually to have the digger delivered rather than trying to tow it yourself.
This is the bit people get wrong most often. Your licence might allow you to tow up to 3,500kg, but if your car or van is only rated to tow 2,000kg, that is your real limit. Licence entitlement does not override the vehicle’s plated towing capacity.
To find your towing capacity, check the VIN plate, usually inside the driver’s door frame or under the bonnet. You will see figures for the vehicle’s MAM, the maximum train weight (vehicle plus trailer), and often the maximum trailer weight braked and unbraked. The braked figure is the one that applies for towing a mini digger and trailer, because any plant trailer carrying a digger will have brakes.
Towing capacity varies wildly. A small SUV might be rated at 1,500kg to 2,000kg. A mid-sized 4×4 like a Ford Ranger or Volkswagen Amarok will usually pull 3,000kg to 3,500kg. A Transit can vary depending on engine, gearbox and chassis spec. Always check the actual plate rather than relying on what you have been told.
People often assume the 3,500kg figure refers only to the digger. It does not. The 3,500kg MAM is the gross weight of the trailer including everything on it, the digger, the buckets, any fuel, and the trailer itself.
So if your trailer weighs 700kg empty and is rated to a gross of 3,500kg, the maximum you can put on it is 2,800kg. Load it up with a 3 tonne digger and a couple of spare buckets and you are over the trailer’s MAM, even if your licence and vehicle would technically allow more. Driving overweight is an offence whether the rule that catches you is licence, vehicle plate or trailer plate.
Towing a mini digger and trailer means you are also subject to reduced UK speed limits. When you are towing on a single carriageway with a national speed limit, your limit drops to 50mph. On a dual carriageway it drops to 60mph. On a motorway it is 60mph, and you cannot use the outside lane of a motorway with three or more lanes while towing. These limits apply regardless of the vehicle you are driving or how capable it is at higher speeds.
You also need to make sure the trailer is roadworthy. Lights, brakes, tyres, registration plate matching the towing vehicle, working indicators and reflectors. Any plant trailer carrying a mini digger should be braked and have a fully functional handbrake. The digger itself needs to be secured properly using rated straps, and the trailer’s wheel chocks or strap system needs to engage correctly.
If the combination pushes you over 3,500kg or beyond your vehicle’s capacity, the simplest answer is usually to have the digger delivered. At Central Plant Hire we deliver across Sussex, Surrey and the surrounding areas, and for most customers it works out easier and cheaper than buying a trailer that is rated for a heavier digger and sorting your own insurance for the move. Our delivery rates are on our website, and the team can talk you through the options when you book.
It is also worth saying that even if you can legally tow a mini digger and trailer, you might not want to. Reversing a 3 tonne plant trailer down a narrow lane or onto a tight site is a skill, and getting it wrong is expensive. Towing courses are still available, and even though they are not legally required, many drivers find them genuinely useful before towing anything heavy for the first time.
Before towing a mini digger and trailer, run through this list:
Get these right and towing a mini digger and trailer is straightforward. Get them wrong and you are looking at penalty points, fines, or a serious accident if something fails on the road.
At Central Plant Hire we deal with this kind of question every week, and we are always happy to help work out whether towing a mini digger and trailer makes sense for your project or whether delivery is the better option. If you are not sure what size machine you need, what your vehicle can pull, or how to get the digger to site safely, get in touch and we will talk it through with you.
