Unfortunately the two aspirations of more north to south trains and electrifying the North Wales coast line are contradictory. More north to south trains whether they be DMU's or loco hauled will undermine the business case for the wires. If you get an hourly Holyhead to Cardiff service how do you justify wiring the coast? West of Llandudno Junction two thirds of trains would be diesels under the wires. There's plenty of candidates for electrification in Control Period 6 who will have a higher percentage of trains with electric traction.
Whats more important to the North Wales Coast a modern electrified railway or through trains to Cardiff? Its tough choices time, nothing to do with agendas or ideology just practicality's.
Oh yeah, that's the other reason for my suggested service pattern with north Wales trains going to Crewe/Manchester and trains from Birmingham/Cardiff via Wrexham terminating at Chester. Do it that way and wiring the north Wales coast is a much easier prospect than if you have to wire Cardiff/Birmingham - Wrexham - Chester too.
[*]ScotRail run no services entirely out of Scotland
It would be quite easy to make W&B contain no services entirely out of Wales though, run north Wales services through to Crewe as I suggested above and either give the Crewe-Shrewsbury to another TOC or extend it through to Cardiff or Swansea (the latter via HOWL).
And besides if they are going to wire Warrington - Llandudno via Chester, why not just extend it all the way to Holyhead?
Because most of ATW's hourly Holyhead service reverses at Chester and runs via Wrexham to Birmingham and Cardiff, which means these trains would be diesel and wouldn't be able to make use of the wires, unless you also wire Chester - Wrexham - Birmingham/Cardiff.
With regards "through passengers" - always a good number, but like any long distance routes, most people are on for portions of the full route.
Ok, so there's a good number of through passengers remaining on ATW trains through the reversal at Chester. I think the number of passengers remaining on the train through Chester would be even greater if north Wales trains ran to Crewe/Manchester rather than Cardiff/Birmingham(via Wrexham), and I'm sure others here would like to contest if you claim otherwise.
I can't ever see North - South via the west coast (which of couurse would need Bangor-Caernarfon-Afonwen and Aberystwyth-Carmarthen reopening) becoming a reality any time soon...
Neither do I, unfortunately. However, I don't actually see Aberystwyth - Carmarthen being part of a north-south route, and wouldn't suggest reopening Caernarfon-Afonwen at all.
My proposal for north-south within Wales (and it'd still require a change, due to electrification extent) is inspired in part by the HS2 Y-network proposals (and I'd suggest funding much of Wales' equivalent using the Barnet consequential from HS2) would be:
- Brand new electric route Merthyr-Brecon (ignore the original route, too curcuitous) - the electric bit
- Brecon - Builth Wells - Newtown (part new part-reopened)
- Welshpool - Oswestry - Gobowen reopening)
- Porthmadog - Caernarfon - Bangor (part new part-reopened, cutting a corner off)
Also required would be heavy upgrades to the Cambrian lines, with as much of the new track as possible being built for 90mph (the smae should apply to the Cambrian main line). Bangor - Cardiff (with one change) would probably be a similar journey time when compared to via Chester (with one change), but for intermediate journeys, say Cardiff - Builth Wells or Caernarfon - Brecon it would be transformational.