What are the restrictions / limits on the use of trade plates?
I ask as a neighbour trades cars from his drive way (and the road!) and has trade plates. I have lost count of the number of cars that have passed through his hands but there are several that are regularly there and so presumably belong to the family. I had the daughter all dolled up for a night out follow me down the road in a car late in the evening in one of the "family" with a set of trade plates on display and no apparent tax disk.
I assumed that the trade plate were for use as a "portable tax disk" when a vehicle was being driven for trade purposes. Is this correct and does it give any type of exemption from anything else such as insurance etc? Car the car be left on the road with the plates on show?