Peter Sarf
Established Member
The 72 stock are 112m long (give or take) where a five car 378 is 100m so not sure where platform extensions are required.
However it was started somewhere DC lines were to see 5 cats temporarily. This makes sense as we ate several years away from new stock and stopping the production line or storing carriages for a couple of years makes no sense. Former especially as the final Electrostars will be completed in early 2017.
I had not thought of the existing tube services . Mind you I am surprised that a five car electrostar is getting on for the same length as a Bakerloo line train. But then it does seem a long walk to the front of the train at Victoria (so I am nearer to the East Croydon exit).