Whoops! I didn't read that properly. The width of the trains would cause a problem though as they would end up striking the platforms and hitting the trains traveling in the opposite direction!
Well I was proposing building virtually an all new line for the route to Norwich so it would be built to accept Shinkansen width trains, allowing for decent width 3+2 trains to increase seating capacity even if double deckers were considered no go for dwell time reasons.
There would be shrunk trains similar in size to Cl395s to run on routes off the line to places like Clacton or Harwich obviously.
Shinkansen - is there anything it isn't the answer for?
Seriously though, Norwich is a pretty small place and I can't see that kind of investment being viable for that population
http://en.wikipedia.org/wiki/List_of_English_districts_by_population (137)
Well everyone always blames the old nature of our existing railway network for why we can't widely adopt things like double decker trains or intercity sets with 3+2 seats, or 400m long trains as standard.
The obvious solution to this would seem to be to build a new network almost from scratch.
And the cost would indeed by rather high, but we are effectively talking about having to build a new transport infrastructure almost from scratch over the next 20-30 years, why not just do it properly and be able to live off of it for the next hundred years as the Victorians did 100-150 years ago?
Also you have to include other areas along the route, like Braintree, Colchester and Chelmsford which is for some reason
larger that Norwich.
Also I imagine the cost of these projects would drop to levels similar to those seen in Japan if we had a rolling construction programme (both of infrastructure and rolling stock).