The 26 minute journey time was for an all new railway line, which is what NPR wanted originally.
The attempt to force the trains onto the existing route came later. When DfT got into their head that a route on the existing track through Warrington BQ Low Level would be cheap, somehow. (You'd think they'd learn after so many failed modernisations)
That resulted in a journey time several minutes longer, the all new line concept likely involves a tunnel out of lime Street and emerging near the M62 for the Run to Warrington.
Those two things can be true at the same time.
The line through Runcorn can't be meaningfully improved, it is woefully substandard but the only way to improve it is wholesale replacement.
Victorian infrastructure is a terrible basis for a modern railway, we must modernise or die.
£120m (1% of £12bn) gets you almost nothing, these days.
@Bald Rick tried to price those proposals once somewhere on the forum and came up with a price more like £1bn.
You have to bridge the ship canal amongst other things, and a lot of the alignments are in very bad shape.
An this obviously does nothing but save a couple of paths through castlefield.
OTHERWISE:
Does anyone know why the speeds in the trench on approach to Lime Street are so painfully slow? 2 miles at 30mph is quite something.
Is it lack of safe access routes for staff or something?