Given the future ICWC operator plans to acquire some "baby Pendos" anyway, wouldn't it be more logical once the wires are up Liverpool-St Helens and Manchester to Preston via Bolton, for the ICWC operator to use new short/existing long Pendos on a diamond style structure, e.g. London/Birm-Lpl/Manc-Glasgw/Edin and return? These trains are far more suitable for the NW - Scotland long(ish) distance flow and at 125mph will be quicker than the 110mph Class 350s, plus would avoid the latter holding up the core Pendo services on the WCML anyway. I'm not entirely sure why Trans-Pennine is operating a NW - Scotland service anyway given its name as this will be a pure WCML operation. It just seems more logical to me this way. TPE can then focus on "proper" Trans-Pennine routes, possibly including restoring Leeds-Glasgow via Carlisle...
On another, admittedly fanciful note, with the Manchester-Leeds via Huddersfield line being upgraded and electrified, would it be feasible to use TASS to enable a Pendolino type train to do 125mph over this route? Could the same be done to Manchester-Sheffield via Hope Valley? TPE could then use Pendolinos on services up to York/Newcastle, even, gasp, running at 140 if parts of the upper ECML can indeed support that. Not cheap, and not really realistic, but it's nice to dream, and maybe then Northerners will have something to offset the chip about getting 2nd hand suburban EMUs all the time.
Finally, diverting the topic before it's started; why not send the future surplus Thameslink Class 319s to Merseyrail ? that dual AC/DC capability will be genuinely useful as/if the network expands, it's much cheaper than MR buying new stock (although a 378 type would perhaps be ideal) and means MR can use current/planned/future OHLE lines, and convert it's non 3rd rail accordingly.
On another, admittedly fanciful note, with the Manchester-Leeds via Huddersfield line being upgraded and electrified, would it be feasible to use TASS to enable a Pendolino type train to do 125mph over this route? Could the same be done to Manchester-Sheffield via Hope Valley? TPE could then use Pendolinos on services up to York/Newcastle, even, gasp, running at 140 if parts of the upper ECML can indeed support that. Not cheap, and not really realistic, but it's nice to dream, and maybe then Northerners will have something to offset the chip about getting 2nd hand suburban EMUs all the time.
Finally, diverting the topic before it's started; why not send the future surplus Thameslink Class 319s to Merseyrail ? that dual AC/DC capability will be genuinely useful as/if the network expands, it's much cheaper than MR buying new stock (although a 378 type would perhaps be ideal) and means MR can use current/planned/future OHLE lines, and convert it's non 3rd rail accordingly.