There are a few pretty fundamental points missed:
1) The economic benefits are at its strongest when you add in connectivity to Luton Airport (and a town of that population size)
2) Few will ever use the route for the full Oxford to Cambridge route - it will always be quicker via London, but those not pressed for time might prefer the more scenic route without the need for changing in London. Changing in London isn't a great experience.
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I don't think any serious advocate of the route imagined anything but a minority of future passengers on a completed E-W Rail would be Oxford - Cambridge. It is, as you say, a massive combination of towns that could be linked up, from Reading to MK, or MK to Cambridge, or Bedford to Norwich etc - using connections, of course.
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Luton-Bedford-St Neots-Peterborough-Doncaster involves as many changes as the existing service Luton-Bedford-Leicester-Sheffield-Doncaster and is no more direct. I don't see the benefit.
I tend to agree. If you are going Luton or Bedford - Doncaster (or any station to the north on the ECML) I think the present service, up the MML and then across, suffices. Not idea, of course, but doable.
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A little historical diversion I hope will interest people...
Back in 1846, the Eastern Counties Railway planned a railway line from Cambridge to Bedford via Shepreth, Biggleswade and Cardington, partly as a ploy to keep their rivals out of the region. They ran out of cash before they could start, but when the GN wanted to extend from Royston to Cambridge, an arrangement was come to where the ECR built their proposed line as far as Shepreth, and the GN joined up to it from Royston. I went and got the drawings from the County Archives in Cambridge and photographed them. The route was planned by Robert Stephenson & Co, and features gentle gradients, a short tunnel, and more than a few level crossings - including the notorious one at Foxton!
This was at the same time as the ECML was being planned - it appears on their drawings as "parliamentary line of London-to-York railway" and they show both a flyover and a series of flat junctions with the ECML.
I was curious to see how much of Stephenson's route would usable today. It's pretty easy to trace on modern imagery, and the key present-day obstacles are:
- Bassingbourn Barracks
- the town of Biggleswade, which has expanded considerably
- the Bedford bypass
Interestingly, the ECR's planned route into Bedford was built by the Midland Railway as part of their Bedford-Hitchin line (their original route to London) and so mostly still exists.
EDIT: here's a
Google Maps link showing (roughly) the line of the route.
It's a shame this wasn't built, rather than the Potton/Sandy route. Biggleswade was a much bigger place than Sandy, and it had a school (stratton) that would have made it a commuter destination in the 60s - nobody commuted to Sandy. That, and the fact that it involved more shared costs with other services, might have helped the line survive.
As a further point to ponder, in terms of how difficult it is to do the eastern bit of any proposed link up, imagine you are a planner alive in 1962 and can see the problems faced in 2012. In other words, you need an east-west route to be kept alive - which one would you keep?
Oxford-Cambridge? Fine at the western end and up to Bedford, but not very fast and no big towns between Bedford and Cambridge.
Further north, you have the mirror image of this, ie
Banbury? - Northampton-Peterborough - Cambridge? not bad on the Northampton - Peterboro for speed I imagine (I never used it east of Irthlingboro').
But, no common MML line station, no easy link to Peterborough North (needs reversal) and, east of Northampton, the line was a tertiary route to Banbury.
Kettering - Thrapston-Huntingdon - Cambridge. Lightly laid, reversal at Huntingdon. How do you go west from Kettering?
Futher south, you had Leighton Buzzard to Luton and Hatfield. Again, not ideal.
so even pre Beeching, there was no obvious route to develop - even if Beeching did choose Oxford-Cambridge originally.