wrote in message

On 05/02/2011 00:19, Paul Corfield wrote:

I wonder why they didn't simultaneously carry out signalling upgrades
on the Metropolitan line segments that run parallel to the Jubilee
line since the S stock is most probably equipped with ATO capacity.

The subsurface resignalling is a different (Metronet-originated, but now
re-tendered) project, whereas the Jubilee resignalling was a Tube Lines
project.

I believe they will (inevitably) be using different systems, another
long-term legacy of Gordon Brown's disastrous Underground PPP contract.
The Jubilee line uses Thales, which didn't make the shortlist for the
subserface lines. The resignalled Picc will now use the same system as
the subsurface lines (with which it shares tracks), rather than Thales
as originally planned.