I always wondered how well a radar jammer would work on gatsos. Obviously vv illegal, but a bit cooler than the hard kill solution aka angle grinder+pick up truck! Mind you, though, a camera based system like Specs would be pretty much invulnerable to such methods.
(Note - however hoax the email is, it does state that speed camera signs would be erected. Hence legal)
But what's this?
"The new motorway signs have been designed to accommodate closed circuit television cameras. These cameras will be used by the Highways Agency to assess the effectiveness of the new signs by monitoring traffic flow and movement patterns in response to the driver information messages set on the signs. Real-time images from these cameras will also be available to Thames Valley Police at their motorway control office, offering additional aid to locating and managing incidents on the motorway more swiftly and helping to set the new signs more promptly and accurately. The cameras will not be used for speed enforcement."
http://www.highways.gov.uk/roads/projects/ms4/03.htm
Can we believe them? Tinfoil hats on....