Old signals on the jubilee line

It'd be a lot of work recommissioning the old signals AIUI.

Probably just there's other things to be done before they come down!

I think the trainstops have been either 'pegged down' (as a start) and some have already been removed.

I am sure some have already been removed. However, next time I am around, I will recheck and re-post what I find.

Recovery of redundant equipment and cabling is not a priority unless it is occupying space required by something new, in which case some kind of enabling work would have been done where necessary in order to get the new eqipment and cabling into place.
The modern way seems to be to install new cable runs instead of clearing the old runs as we used to years ago by dropping extant, but becoming redundant, cabling into balata straps slung beneath.

Equipment wise anything 'coming out' will usually be clearly marked as will anything 'staying in' using the usual painted on coded identifications. Sometime following the commissioning of the new equipment the old equipment gets removed. Back in the heyday of signalling installation the New Works division would generally test and commission the new equipment and remove the redundant equipment in the same shift as sites were resignalled, this was the pattern for both single and multiple site resignalling and often involved relaying of track, rerailing, communications upgrades and other works all in the same shift. I worked on many such 'changeovers' in the late 1970s and on into the 1980s.

In the case of the Jubilee line I expect the old equipment will be in demand as (a) spares to keep other lines signalling maintained until upgrade (b) to be donated to preserved railways who are always looking for spares, especially signal heads, relays and equipment cases, SPTs etc (c) the TfL/LT Museum although I have heard that it has more exhibits than it can ever use so it would probably only want rare items (d) possibly other museums (e) scrap.

The cable will definitely go for scrap and should go some way towards offsetting the cost of the resignalling by a small amount as should any scrapped equipment which can be recycled to make something else. Of course that rather depends upon cable thieves being kept away from the system until the redundant cable can be recovered legitimately.

I'd love a signalhead in my room!

How about a subsidiary signal instead and 'call on' the friends one at a time!

This was answered somewhere recently but I can't find the thread. Basically, "signal failure" means "failure of some part of the signalling system", not necessarily a physical signal. Indeed I think I remember reading that it's more likely for the train stop to be at fault than a signal head. "Signal failure" is a simplified explanation that (a) the general public can understand and (b) is generic enough not to need know exactly what has failed - which isn't always going to be known at the start of a failure.

Thanks for the info Chris M and 21146.

I can now confirm that the trainstops were removed about 2-3 months ago with the exception of the northbound starters at West Hampstead and Willesden Green, and the exit from the sidings at the same locations. Also, all the shunt signals south of Dollis Hill were also removed 2 months ago. All of the 'old' signals are now switched off with no power to the red/green aspects.

What arrangements, if any, will go in at Baker Street to test the ATO of any train entering the Jubilee on the northbound or the tripcock of any train exiting the Jubilee on the southbound?

The ones at Canning Town are still working too

It was announced (internally) that from 15.08.11 the old signalling equipment would start to be removed. But not a lot seems to have happened so far, unless I have missed something, or it is all happening behind the scenes?