farmerbill:Peter, not quite sure where you get the 15 minutes from.
I had read (I know you can't believe everything you read) that the journey time would be cut by twenty minutes. I then reduced it because proponents always overstate a case.
I know that a case can be made from the point of GO and the point of STOP and that on balance, I would be against the scheme at this time. However, a point in its favour not yet made is that history teaches us that many schemes which were of questionable value at the time they were built, turned out to be a benefit to subsequent generations.
For example, the Victorians built the London Underground that was massively over specified for its day, but which is critical nowadays. Likewise, their national rail network which, had it not been partially destroyed by Beeching would have been playing an even more important role today..
The Interstate Roads in the US were built at a time of recession but no-one would close them down today, similarly the German auto bahns.
It could be further argued that had the Danes, Norsemen and Saxons been a bit more farsighted they could have made better use of the roads left by the Romans and possibly created a more integrated and dynamic Britain earlier.