To clarify, I'm not saying don't do it. I still would, the chances of an officer giving you a fine on the spot is very small. They would more than likely use their discretion not to fine you (depending how you RLJ of course - if you use it as an excuse to barrel through a junction then that's just stupid).
In a car with a NPR camera trap, you could appeal, they might let you off, but if they don't then that law is not on your side.
To clarify, I'm not saying don't do it. I still would, the chances of an officer giving you a fine on the spot is very small. They would more than likely use their discretion not to fine you (depending how you RLJ of course - if you use it as an excuse to barrel through a junction then that's just stupid).
In a car with a NPR camera trap, you could appeal, they might let you off, but if they don't then that law is not on your side.