On 9 June, 14:40, wrote:
On 9 June, 00:38, asdf wrote:

On Sat, 6 Jun 2009 10:20:56 -0700 (PDT), wrote:
Oh ang on though, if they used platform 1 at HotH, I think there may
be a crossover. *Not sure if it isn't just a track crossing to/from
the Metropolitan or if it leads to/from the up Chiltern track as well.

I can't remember if this crossover can be used from Up departures from
Platform 1 at Harrow. My memory tells me that there is no signal for
this route. What I can't remember is if the crossover from the NB Fast
to the Platform 1 just passes over the intervening Up line or whether
there is pointwork in the Up line allowing access.

There isn't pointwork - it's one of those things that I think is
referred to as a diamond crossing.

Thanks, I though it probably was, but couldn't remember.

It can't be that simple though, because it has to allow for
Metropolitan trains in both directions, doesn't it? So there must be
something from the up Chiltern to the Met as well as the diamond from
the Met to the down Chiltern, even if nothing from platform 1 to the
up Chiltern?




Then again, all the signalling in that area (and for some distance to
the east of Harrow, even on the NR lines) is LU-operated anyway. Or at
least the signals look like LU ones. So LU signallers would be needed
in any case (and if any were available, the trains could just reverse
using the trailing crossover to the west of Harrow).

That's true.

Besides, in this age of can't-be-bothered railway operations, even
Chiltern would have to be absolute saints to run a Harrow-Marylebone
shuttle under such circumstances, what with the far easier option on
the table of just cancelling everything.

Chiltern have run such shuttles in the past, when there has been
engineering work in the Wembley area. They reversed using the
crossover north/west of the station as you suggested.