Hi Martyn. Have indeed read the whole thread and I commend you on having raised a very important point which, with respect to others, seems to have slipped off the radar of this topic at times.
Do you know whether the MMC have taken up this issue with their contacts as it is as much in their interest as ours that car and probably some bike licence holders can drive (NOT ride) the M3W on their respective licences. MMC are you reading this/aware of the issue?
I am in the process of lobbying MP and MEP too but it really needs the responsible EC/DVLA officials to see one on these unique vehicles. They clearly seem to be totally unaware of its form as it is a much a car, sat behind the controls, as a car!!
Think this rule must stem from the continental preference for the chopper type three wheeler which is, in my view, clearly of bike origin. Guess that is all the MEPs and EC officials see and know about so I, for one, am going to help do something about it.
It is never too late to change these administrative rules.