I'm sorry but I consider this camera to be an atrocious waste of our money and it only confirms how right George Orwell was in his vision.
If the traffic isn't heavy there is very little danger in someone doing, say, 85-90. This country has a nasty habit of doing things and worrying about the legality/implications of it after.
You can't even enjoy your car in this country anymore. I think if the police spent half as much time avoiding traffic delays instead of busting you the moment you go slightly over the (stupidly set) 70mph then I might be more convinced.
As for me I might just put on some false plates and enjoy myself