I think its made by ProVida.
See: http://www.ukspeedtraps.co.uk/opration.htm
Unfortunately, there's no date on the page.
QUOTE (ukspeedtraps)
Basically if a piece of equipment does not have Home office Approval they should not be using it, as in the recent case in Scotland where the Police have been using a system called "PolicePilot" which had not been given approval, it was challenged in court.
Legal experts said the admission casts doubt on previous cases in Scotland involving the device. Ken Dalling, a Stirling solicitor, said: "This case is likely to cause a lot of people who have accepted their convictions to give further consideration to their position. It means that all the convictions over the past four or five years based on this device may be unsafe."