On Wed, 4 Aug 2010 01:39:30 -0700 (PDT)
"Capt. Deltic" wrote:
This is the question I have been asking.

the official argument for separate fleets is that Crossrail needs to
have 23 m long cars with three doors a side because of the capacity
requirements/ station dwell times while Thameslink can accomodate only
20 m long cars with two doors a side because of curvature. - despite
similar capacity/dwell time issues.

If they want to really future proof it they should build UIC gauge double
decker trains instead of ****ing around with piddly UK gauge EMUs that
will be packed from day 1. It won't happen of course because there might
be the odd bridge that'll need raising by a foot on the out of london routes.
Obviously this would be a huge expense compared to digging 10 miles of
tunnel under london....

B2003