The report that I received from the NIAO on On-Street Parking referenced a survey of on-street parking commissioned by Roads Service in 1998. This was the one that revealed that 41% of cars surveyed were parked illegally (94% in some areas), and that thus Roads Service could be losing as much as £300k a year of income in unpaid charges.

This seems like an interesting thing to try to dig deeper into, so I’ve made a request to Roads Service for any reports or results from this survey. I’ve requested that it should ideally be made available on-line, but that I’ll accept an email version, or, as last resort, hard copy.