On 13 June, 22:09, Barry Salter wrote:
On 13/06/2010 16:00, wrote:

Are there ever occasions during planned or unplanned service
disruption where an LU *train heading say "eastbound" will require to
finish its journey in the "eastbound" platform of a two-platform
station, pick-up intending "westbound" passengers for the next
departure whilst still on the "eastbound" platform then head
"westbound" on the "eastbound" line in order to access a crossover to
the "westbound" line?

I've "done" such a move at King's Cross St. Pancras (Met) in the past
few years. Westbound trains terminating in the Westbound platform, then
gaining the Eastbound line via a crossover just off the East end of the
platform.

If memory serves, it's also possible to have a "wrong road" move from
the Eastbound platform at Moorgate (Met), though I'm not sure whether
that counts for the purposes of your question, given the two bay platforms.

There is a trailing crossover there.

Only Woodford seems to have trailing crossovers at both ends, although
I suppose Lambeth North and maybe Hatton Cross or something that way
have a trailing crossover before the next station in both directions.