On 11 Sep, 14:20, Roy Badami wrote:
On 11/09/10 07:40, MIG wrote:

More than just luck in this case, because no train would be allowed
into the block while a train was leaving the bay, but that doesn't
answer the general point about lack of signalling or (possibly) lack
of tripping once a train is heading along the wrong track.

But what about the other way round? *If a train was already in the
block, could a train still have been routed from the bay onto the wrong
track? *Clearly it shouldn't be possible, but then this incident
shouldn't have been possible either?

* * *-roy

Well, true, everything could fail to work I suppose. Not sure where
that gets us.

It seems unlikely that the approaching eastbound train could be
allowed into the block no matter what, either because the departing
train was crossing its path or because the points would be set for it
to enter the occupied bay.

The next question is, is there a legitimate reason why a train could
exit the bay on a green light and go down the wrong line? If there
is, then there wouldn't be any interlocking to prevent it.

Eg, do trains ever come out of the bay and then reverse to head for
Barking sidings? I can't see any possible operational reason for
doing that (would just terminate at Barking in the first place), but
is it signallable?