Update:
Just found this (it wipes out the Truvelo theory)
Times Online wrote:
The new forward-facing camera has been developed by Gatso, the biggest speed camera supplier, to work in conjunction with traditional rear-facing cameras. The flash of the first camera triggers the second, which takes a digital image of the front of the vehicle, using an infra-red filter to prevent the driver from being dazzled and to ensure clarity in darkness.
The London partnership has bought five of the cameras, which cost £10,000 each, and is installing two on Lower Thames Street in the City next week. Several other partnerships, including Derbyshire, have expressed interest and hundreds of the cameras are expected to be installed across Britain. Trevor Hall, operations manager of the Essex partnership, said: “The cameras have been highly successful in cases where the driver claims it was his wife but the image clearly shows it was a man driving. When people see the images it helps to change their minds.”
http://www.timesonline.co.uk/article/0, ... 24,00.html
I’ve sniffed around the Gasto site; it would appear they actually do supply a digital camera with infra-red flash.
I know it is illegal to alter a VRM to make it unreadable to any enforcement camera, but AFAIK it’s entirely legal to apply an IR filter to your windscreen to help stop you getting so hot from the sun’s rays........
