In message , at
01:06:38 on Sun, 25 Feb 2007, Tom Anderson
remarked:
There's no particular reason why they would be left pointing into a
siding, but even if they were I'm sure the train crew would have a way
to shift them back to the through line.

True, but in the case we're talking about, they might well be left
pointing at Uxbridge!

That's where I'd want them to be pointing. Direction of M4 and/or
Northolt and/or connections to National Rail lines to the west.
--
Roland Perry