Re: No car tax?
All speed averaging cameras are capable of dumping ANPR info for this purpose. All of London low emission zone cameras can do it too. Same for the congestion charge. Same for parking charges. Same for...
Not doing so is a waste of public money - in most cases we f*** paid for the bloody things to be put up. In the cases where they are private (ANPR at parking entrances and exists) the police is perfectly entitled to ask for a nicely formatted dump once a month.