I was going to start a new thread but I'll just post it here as its more or less the same thing.

When does a camera decide to flash you?

Its happened to me on numerous occasions on the A10 travelling at 40mph and then about 10 metres or so approaching the lights, they decide to change to amber. I wont be able to stop even if I slam my brakes to the floor so instead I just floor it to pass them and get through the amber light. I normally clear the entire crossing before the red comes up. Is that OK though?

Does it have to be solid red before the camera can catch you and do you have to be going over the white line when red for it to catch you?