The number of drivers slapped with speeding fines in Scotland fell more than 60 per cent, official figures showed.

The number of speeding fines issued to drivers caught by cameras dropped from more than 114,000 in 2006 to below 50,000 in 2009.

But according to some experts, the fall in the number of speeding fines was not just due to safety messages and tougher penalties. They claim the fall is the result of camera-detecting satnav systems, which tells drivers where cameras are placed and provide audible warning on approach.

Currently, almost half of the British drivers own camera-detecting satnav systems. Moreover, regular drivers become aware of camera locations.

Commenting on the topic, the RAC road safety chief Andrew Howard said, "As a speed camera spends longer at one spot on the road, regular users have to be quite daft to be caught.”

Meanwhile, a speeding charge against a 37-year-old driver, Graham Lee, dropped due to flawed camera.

Mr. Lee was caught driving at a speed of 40mph on the North Orbital Road at Denham, where the speed limit is 30mph, but later it was found that he was caught despite not breaking the speed limit because of a fault in the camera.