Ian wrote:
"Nick Finnigan" wrote in message

Walter has posted HC rule 154 which shows it is legal.
If vehicles are close together, one will generally have proceeded over the
first white line at the time the signal turns red.


Only if the driver ignores the meaning of an amber traffic light.

You seem to have a different interpretation of the regs to me, and I
can't see why, so here a simpler example:

You are driving (a motor vehicle) at a safe and legal speed, with no
other vehicles moving in your direction for 200 yards, approaching some
(green) traffic lights which have these two stop lines in front of them.
Then the lights change to amber; you move your foot to cover the brake
pedal, and realize that you can not (physically, and so safely) stop
before reaching the first stop line. You can, however, stop safely
before passing the second stop line. You can also get past the second
stop line before the lights change to red (based on experience).

What legal options do you have? Which is the best one?