Some answers here -
http://www.sussexsafetycameras.gov.uk/facts.htm. The usual propaganda guff at the top, some techie info in the middle, and stuff about the certificates at the bottom, including this:
Quote:
Each camera is calibrated once a year. Here are examples of calibration certificates, signed by qualified engineers authorised by the manufacturers. Click the thumbnails for enlargements.
This is the Gatso one.
I imagine they won't be keen on showing certificates unless a driver is fighting it in court. Don't know about recalibration, but I'd have thought more regularly than the annual certificate.