"John Salmon" wrote in message
...

"Jack Taylor" wrote
At West Ruislip the centre road is an
up through line (although, IIRC, it is bi-directionally signalled ...

Not according to Quail.

Thx for that. I wasn't entirely sure and haven't got a Quail to refer to.
Actually, now I think about it, I should have looked at my LNW sectional
appendix!