In message , at 16:06:36 on Fri, 10
Sep 2010, Richard J. remarked:

The Evening Standard said that there were two signals between the two
trains, both at red, and that a TfL sokesman had said "The nearest
eastbound train was stationary at red signals almost a kilometre away
at West Ham." But of course, as I pointed out in my post at 13:10
today, those signals only controlled eastbound trains. There would
have been no signals controlling the westbound train on that track
after it left Plaistow. It was only stopped thanks to the driver's
alertness.

But surely that's what the much-vaunted "route knowledge" (of where the
relevant signals should be) is all about - drivers knowing they are on a
bit of track they shouldn't be.
--
Roland Perry