Brian Widdas wrote:
In article , Nick Finnigan wrote:


What makes it not legal to drive past the second stop line on amber?


TSRGD2002 36(1)(e)

"the amber signal shall, when shown alone, convey the same prohibition as
the red signal, except that, as respects any vehicle which is so close to
the stop line that it cannot safely be stopped without proceeding beyond
the stop line, it shall convey the same indication as the green signal or
green arrow signal which was shown immediately before it;"

For a car, TSGRD2002 43(2)(b) defines "stop line" as being the first stop
line, or, if you've passed it, the second stop line. So, if you can's stop
safely before the first line, but you can stop safely before the second,
that is what you must do.

If you increase your speed before crossing the first line, so that you
are not then able to stop (safely) before crossing the second line, you
will still be able to obey that rule whilst passing both lines on amber.