So will p2a survived under Truss's axe?
I'd argue both 2A and 2B(west) need to go ahead to make the best of what has been provided at 1. What should be done with some of the excess capacity freed by 2B(east) ? Perhaps more west coast services, more Liverpools, perhaps Chester, Blackpool added. Full 400m capabilty would not be required at new destinations, as trains can split and combine at major hubs such as Crewe and Preston. The Golborne connection is needed as any alternative junction near Warrington on some additional NPR/HS2(x) new Liverpool access would entail difficult junctions in built up areas on rather twisty routes anyway so would significantly slow down Scottish bound HS2 trains. The double track north of Crewe, although avoided in Ph1/2A by trains turning right to Manchester, and beautifully aligned for high speed, really needs to be avoided by Scottish HS Expresses as it's shared with some local traffic and, importantly, lots of freight. That element of 2B(west), and the fast tunnel under Crewe, is essential to remove express conflict with other traffic, again releasing capacity that could be used by other local services, and providing flexibility and resilience for all traffic groups; complete grade separation, so no need to ensure everything is stationary every half hour(?) to let a pair of expresses thunder through, then hold on pause for another five minutes because one passes through late.
So here's my political compromise:
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Phase 1 - Complete as planned, but make provision to use some of the new Birmingham Curzon Street terminus capacity for Long distance Cross Country trains reversing with new connections to Gloucester and and Coventry lines an eventual aim. This could effectively use the Birmingham spur additionally as an extra pair of fast tracks for the Cross Country Derby access.
Phase 2A - Complete as planned.
Phase 2B(W) - Complete trunk route through Crewe to Golborne (The Scottish Connection), Make suitable provisions for new NPR junctions, but do not build Manchester spur.
Continued support and encouragement for development of NPR proposals by Northern planning bodies, with possibility and desire that some HS2 services might be diverted via some of that infrastructure once it is completed.
Phase 2B(E) - Cancel (some elements might be resurrected by NPR).
Extra West Coast services to use some of the capacity released on the south section of the Trunk.