Not as i interpret it:
Cars or light vans, with or without trailers

The term maximum authorised mass (MAM) means the total weight of the vehicle plus the maximum load it can carry safely.

Category
Description
Minimum age
B
Motor vehicles with a MAM of up to 3,500 kg, no more than eight passenger seats, with or without a trailer - weighing no more than 750 kg
17*
B
As category B but with a trailer weighing more than 750 kg. The total weight of the vehicle and the trailer together can’t weigh more than 3,500 kg. The weight of the trailer, when fully loaded, can’t weigh more than the unladen weight of the vehicle
17*
B auto
As category B with automatic transmission
17*
B+E
As category B but with a heavier trailer that isn't covered in the descriptions for category B
17
*Age 16 if you are currently getting Disability Living Allowance at the higher rate (mobility component).
Example of category B with a trailer weighing over 750 kg: Motor vehicle with an unladen weight of 1,500 kg and a maximum weight of 2,000 kg towing a fully loaded trailer with a weight of 1,500 kg – total weight 3500.


I don't see the issue personally. People get hung up on MAM, GVW etc etc.

Provided your trailer and load doesn't exceed the unladen weight of the tow vehicle and whole lot once laden doesn't exceed 3.5t you're fine.

I maintain though that to remove the doubt do the test.