The parts of the M25 I use dont have cameras and as far as I know none of the M25 does. In the 9 years I've been driving I have never got any tickets.

I have only been stopped by the cops once for silly driving. I was lat night and I was following a car in front who was doing 50 on a 70mph country road. It was a sigle lane each way road and I had a car behind me. We we came into a street which is a 30mph zone I decided to floor it and overtook the car infront. As I pulled away I looked in my rearview mirror and noticed the car that was behind before had done the same thing. I thought oh no it can't be can it then it happened the blue lights came on. How stupid could I have been to do an illegel overtook with a copper behind me. I pulled over and got a warning for a first offence. This was happened when I had my second car at 18 years of age and have not had any trouble since.