In 2007, 1.26 million fixed penalties were issued, down 370,000 or 23 per cent, from the previous year, according to figures in a Home Office document.
Until April 2007 police and local authorities kept a proportional share of fines in order to pay for more cameras. Since this period however, they have received a fixed amount in order to pay for all aspects of road safety.
First lesson in economics that. Incentives matter.