Earlier I saw a car pulling out of a side street and scrape a parked car really badly - it took the car a few attempts to get away from the parked car so more scraping - and drive off.
I took the numberplate and left it with the shop opposite and my phone number. The shop wrote a note and put it on the car.
The owner of the car just rang to thank me and has reported it to the police and insurance.
Wibu? Was it none of my business? It was obviously not malicious so I hope the other driver doesn't get in too much trouble but I think they should have stopped and left contact details!