Really? Are you now assuming NPR is dead if Labour win the next election/next 2 elections?
NPR more or less died with HS2 Phase 2b, they've just been going through the motions (and only the really cheap motions!) since then.
They've already started repackaging it into an upgrade package, with the length of new line getting shorter and shorter.
Given the extremely slow progress on the Transpennine upgrade, its almost certain it will be pushed into the future in favour of "accelerating near-term improvements" or similar buzz words.
I'd be very surprised if anyone ever actually approves construction on a significant length of high speed track, without major political change beyond that currently anticipated.
I'd be interested to know why you are so sure of that. Despite other pressing concerns re the NHS, social care and education. CapEx spending/investment very different to day to day spending.
The Government and Policy communities simply have no faith in the ability of the rail industry to deliver.
That is what has caused the cutbacks on HS2 and the Rail enhancement budget more generally.
Given that Starmer has been against HS2 from the beginning it is hardly likely he will pour money into derived projects like NPR now.
Especially as the entire capital budget is going to be sucked away into the NHS and education for capital spending.
Even HS2 was admitting that the "cheap" HS2 Phase 2 had reached around £7bn before its cancellation, I doubt there will appetite for anything now.