Picture of a Mobile Speed Camera.

This is one of the Mobile Speed Camera vans that now operate at more than 3499 sites across England and Wales, in addition to over 6000 fixed Speed cameras.

The government say the Cameras are solely intended to reduce the number of road accidents.

The suspicion is that they are very often a stealth tax - More than £20 million went to the treasury last year.

Motorists paid more than £112 million in speed camera fines - That’s 1.8 million £60 fixed penalty notices.