Two issues here.
Explanation of towing law on Pistonheads And yes, as it stands, you can't add a trailer for a fourwheeled Morgan to a 7.5 tonne truck. But, what is the weight of said truck converted to carry horses and fully laden? The idea of re-plating it to a lower weight freeing up some weight for a trailer occurs to me. However I've a feeling the speed limits and tachograph regulations might make this a poor option compared to towing a twin horse trailer behind a Discovery.
I'd imagine most readers of this forum are older, passed their car test before 1997, so have B+E on their licences.
Towing safely is not rocket science, but I would advise the novice who has B+E to practise a bit before towing you pride and joy.
