In message , at 18:14:35 on Sat, 6 Dec 2014,
" remarked:
I wonder why they have not yet introduced five-car operation,
considering the passenger volumes, even though they have not finished
making such adjustments at all stations. Could they not lock out the
doors in the fifth car at stations were five-car operation is not yet
available, requiring passengers to move forward?

The new trains on whatever the Hammersmith and City is called this week
do that at stations which aren't long enough (and neither have a
realistic expectation of being extended).
--
Roland Perry