Some are operated by the (*cough*) Safety (*cough*) Camera Partnerships whilst others are actually operated by the Police themselves.

When I took my mums car to a PF meet I picked up MadMac with Switch and b19bal and on the way back up the M10 Mac and I flipped the camera van the bird. Never heard anything about it and my Mum never came and said anything so I'm assuming she didn't get anything from it.