This has all been a fascinating discussion, almost entirely focused on the route in strategic terms.
Let’s be clear, the route in terms of London - Birmingham - Manchester, with a projection of services to the Scotland central belt was absolutely right. It is, and will remain, the economic spine of the country, it has the most congestion on all long distances modes, and by any analysis (of which there has been much, for 20 years+ for HS2, and for 20 years before that for rail and road upgrade proposals). Anyone who wants to change that needs to set out why linking the 3 largest centres of economic activity in the country is the wrong thing to do.
The precise detail of the route, alignment, amount of tunnelling etc, well that has all been decided by democractic principles and process. Anyone who wants to change that is therefore wanting to change how such things are decided in a democracy.
Further to my post yesterday about the democratics (#93), here is a summary of what I believe HS2 Phasing should have been, with reasoning following:-
Phase 1 – Birmingham-Manchester (or Leeds – see below)
Phases 2 and 3 - Birmingham-London-HS1 and Birmingham-Leeds (or Manchester). Priority order of these to depend upon funding, since the latter would be far cheaper but arguably less needed.
Phase 4 – Liverpool-Manchester-Leeds-Newcastle
Phase 5 – Newcastle-Edinburgh-Glasgow
Following from what #Bald Rick has said, the route to serve Manchester and ultimately the central Scotland belt is absolutely right. Serving Birmingham is right too, but not in the way it was done.
The biggest problem with HS2 is that it was designed with Phase 1 running London-Birmingham, with Phases 2a and 2b being entirely dependent upon Phase 1. This has completely dictated the financing, which is exactly why Phases 2a and 2b have collapsed.
Phase 1 should have run right through to Manchester or Leeds, anything less was always vulnerable to being terminated. If the concern was that this was too much of a long length to be undertaken as Phase 1, then Phase 1 should have been Birmingham to Manchester (or Leeds).
These northern sections have always been by far the most beneficial in terms of cost, ie. hugely less per mile than Birmingham-London. Additionally, in terms of time savings Birmingham-Leeds (for example) was to be 45m vs the present time of almost 2 hours, whereas Birmingham-London was just 70 minutes some years ago, and will have not much more than 20 minutes shaved off that by HS2.
Then there is the long standing promise of rebalancing the country, which requires benefits for the north, not yet another London-centric scheme which the present Phase 1 undoubtedly is.
Before anyone shouts about capacity relief for WCML, this is exactly where the problem is rooted. HS2 should always have been seen as a scheme to benefit the UK as a whole, but in practice it has been side-tracked and developed as something to relieve WCML first and foremost, with everything else playing second fiddle to this.
If HS2 had run through to Manchester as Phase 1, this would have provided sufficient relief to WCML anyway. If it had run just Birmingham-Manchester as Phase 1, then you can be certain that the Birmingham-London section would not have been scrapped, and indeed would have followed soon after.
If WCML south of Birmingham has such chronic capacity issues that capacity relief is needed more immediately, then that should have been justified on a stand-alone basis, or at most to tie in with an HS2 starting with Birmingham-Manchester, it should never have been allowed to dominate a scheme for the whole of the UK.
If it’s just about capacity between London and Birmingham, then there has always been scope to upgrade the existing Chiltern Line. If (even worse) it’s about capacity between Coventry and Birmingham (which has been cited by some as being of paramount importance), then this really is a paltry reason to hold sway over a national scheme.
So to conclude, with hindsight (or in advance, as some said many years ago but were shouted down), Phase 1 should have been Birmingham-Manchester (or Leeds). Birmingham-London could have followed closely but putting it first was always likely to be a disaster.