Motorists are to be told officially for the first time which traffic cameras are the country's biggest money spinners under a new "transparency" move to be launched on Monday

Mike Penning, the Road Safety Minister, will order police and local authorities to stop treating drivers like "cash cows" and open up a whole range of previously hidden statistics to the public, The Sunday Telegraph has learned.
The evidence will give a broad picture - for the first time - of whether cameras have been effective in saving lives and preventing injury - or whether they are simply useful revenue raisers.
Up until now authorities have been reluctant to publish admit which cameras were the biggest income generators, with details having to be prised out of them using Freedom of Information laws.
One unit, at the southern end of the M11 in Essex, brought in fines totalling £2.3million in five years, while another, in Battersea, was estimated to earn £1million a year.
Now, however, local authorities will have to publish the numbers of accidents and casualties at camera sites - both before and after they were installed - within weeks.