So the other day I see a guy riding a quad bike along my footpath. Why odd?
Well it was registered for road use?
Tried to get a pic, but He wasn't stopping and by the time I realsed, he was gone.
The quad was definitely registered with number plate, rider had a helmet on, and there was a flashing orange light on a pole stucking up from the back of the seat.
What else? Well he was riding on the footpath not the road (and no, not delivering letters!)
Then finally today the mystery was solved.

Clearly a survey or scanning vehicle to show council where footpath anomalies needed grinding.....
2nd crew of grinders at work today.