Carryfast:
… But vaguely knew about some sort of 3 t rule applying before that but I didn’t know the exact details unladen v gross weight let alone it meaning up to a potential 10t gross.
Carryfast,
That’s my memory of it too.
In 1976, I used to drive a Ford ‘D’ series Custom Cab (HLX 743 K) using my car licence, which weighed in at 2-19-11, so under 3t ULW.
IIRC, it was ex- Godfrey Davies car hire when the boss got it.