"Peter Lawrence" wrote in message
...
On Fri, 28 Sep 2007 17:40:15 +0100, "Paul Scott"
wrote:


"Tom Anderson" wrote in message
th.li...
On Thu, 27 Sep 2007, John B wrote:

On 27 Sep, 13:17, Tom Anderson wrote:

We know A-stock can get between Liverpool Street and Aldgate East
(because that's how units get to and from the ELL) - so why can LUL
not
divert [some of] the Met service from Aldgate to join up with the
District?

- Where would you reverse? A stock can get to Aldgate East, but there
are apparently infringements at Whitechapel,

According to CULG, they're allowed on the District between Aldgate East
Junction and Upminster.

Also according to CULG, they're allowed on the H&C between Aldgate
Junction and Edgware Road! Does that mean that only the Aldgate Junction
to Aldgate East junction is banned (which contradicts the known use for
ELL stock moves), or does that description just reflect the way Clive's
divided the lines up?

My source is Tubeprune:

http://www.trainweb.org/tubeprune/SS...%20Upgrade.htm

Who says "[A] stock is currently barred east of Aldgate because of
infringements at St Marys, Whitechapel, near Bow Road, Barking and
Dagenham". He also says in:

http://www.geocities.com/tubeprune/unstories.htm

"As there are some gauge infringements along the route, some work will
be
necessary to allow the A Stock to run out there and the platforms will
have to be extended at Barking at least. The locations of OPO CCTV
screens and mirrors will also require alteration at most stations
between
Aldgate East and Barking. Some signalling improvements will also be
necessary."

I don't know how much of this is still up to date.

Clive also says of the District "the Richmond and Wimbledon branches are
shared with NR trains" - Richmond, yes, but Wimbledon?


I don't think SWT actually use the platforms at Wimbledon, but they
definitely run empty stock off the Windsor lines via East Putney to
Wimbledon Park depot, and there are crossovers from both LU lines onto the
main line just before Wimbledon station. There are a couple of early and
late trains that use the route in service, and of course it is available
as
required for engineering diversions.

According to the latest Modern Railways SWT will have to fit their
trains with tripcocks and other LU devices if they wish to continue
using the Wimbledon line. I find it surprising that LU can dictate
this.

Is it because the line in question still has NR style signalling without
tripcocks, rather than LU? (I haven't bought MR yet this month). Doesn't
surprise me though - its often been pointed out as an oddity when people
mention Chiltern Stock as having to have trip cocks.

On a similar point, the Crossrail2 Chelsea/Hackney line 'safeguarding' notes
that Wimbledon Park depot will be taken over from SWT for the line's use
whenever it happens, so in the long term the SW franchisee probably won't be
using the line for ECS moves anyway.

Paul