I think in the case I outlined above it was largely driven by Customs & Excise would you believe.. In that for quite some time it has been a problem of farmers adding another string to their bow by buying a digger and hiring them selves out as ground workers, since farming wasnt bringing in the dough. They'd use tractors to haul their kit, but, as it wasnt agricultural use, should have been using white diesel, and have an operators licence etc etc, and HMRC decided (quite rightly IMO) that they should be paying the full tax on the road fuel, if it wasnt for an agricultural use exclusively. After that .. all the other rules followed
The old red diesel conundrum eh ?.. as has now also been brought up to date within the boating business

.... I wonder how long it will be before I get banged to rights for running my workshop heater on red

, or my pressure washer

or I need to declare my heater as Statutory off road