Although the camera may be set to flash at 35+ this has nothing to do with whether to prosecute, most operate the 10% plus 3, but this is not law, and 1mph over can get you nicked.
Personally I think the man is a arse, 81 in a 30 built up area, but it pisses me off that plod think 85 on a deserted motorway deserves a ticket.
Did you know that the camera cannot distinguish objects, so when sited in as say a 60mph limit a car doing 61 can get flashed, if set that low, but a 44ton artic can do 20 mph over his b class road limit with immunity, I wonder which is more dangerous ?
Time we had police on roads instead of cash generator scameras.
tabetha