The problem that way is Wolverhampton-Birmingham.
There's more than one way to get from Stafford to Birmingham New Street; I think at least four (though some are only slightly different). Are there paths available on any of them or is the problem New Street station itself?
Ideally I'd like to see a half hourly service between Bangor and Chester; one carrying onto Crewe, the other to Manchester. If there is space to start both from Holyhead, amongst the proposed bi-hourly Anglesey stopper, and the Virgins, then even better. To compromise a bit whilst still pleasing the politicians, perhaps the Crewe service could then carry on to Cardiff via Shrewsbury?
I would leave 1tph terminating at Bangor, allowing it to be extended to Caernarfon, rather than extending everything through to Holyhead. The London services are awkward, as I don't know whether it would be better to make them part of the hourly fast service between Holyhead and Chester or additional. I take it from your post that you think Llandudno trains should go to Liverpool rather than Birmingham/Crewe or Manchester. That is another question, you have three destinations both sides of Chester, Holyhead/Bangor/Llandudno to the west and Manchester/Liverpool/Crewe to the east, and a basic pattern of 3 trains per hour from Llandudno Junction to Chester, but which pairs do you link? Should the Holyheads go to Manchester, Liverpool or Crewe? Ditto for Llandudno and Bangor/Caernarfon.
Or; is there enough demand for 4tph to Llandudno Junction, two for Llandudno (one semi-fast, one slow) and one each for Holyhead (fast) and Caernarfon (semi-fast), plus the Holyhead-Llandudno stopper every 2 hours?
2 hourly Euston-Holyhead fast
2 hourly Birmingham-Holyhead fast via Stafford (in the alternate hour with the above on the same clockface timings west of Chester, may not be possible to be the same west of Crewe due to Euston-Chester short workings)
Given the awkwardness of having the VT service, the possible lack of paths into Birmingham New Street and the coming of HS2 I have been wondering whether the most sensible thing is to make the London-Chester/Holyhead service an exension of existing Euston-Wolverhampton trains. It would be slower to London, but faster to Birmingham and an hourly through service to both from north Wales. Hell, if they did HS2 properly (with Birmingham being a through station) you might even be able to justfiy running the 200m HS2 trains into north Wales, since it would have both Birmingham and London passengers on it.
Give them all S- or IC-numbers and make it all look like the Swiss local service concept.
Birmingham-Chester via Shrewsbury would start/terminate at Chester not run onto the Coast.
And don't waste money on connecting Cardiff and the Coast for pure political reasons other than maybe one daily direct train pair. That does not reflect actual travel demand.
Don't know what you mean by S- and IC- numbers, and I maintain that the Holyhead-Cardiff service should be three trains each way (no more, no less). That's because, if you only kept Gerald, there is no through train for passengers wanting to go south in the afternoon/evening, and vice-versa.
It seems a bit pointless running Holyhead-Birmingham trains via Stafford and Crewe - there is already a good fast Birmingham-Crewe service (LM & VTWC) with plenty of capacity, and using electric trains.
Why have diesel trains funded by the Welsh government running under the wires in England? It's already usually quicker to change given the slow Wrexham routing of the direct trains, and it's not at all inconvenient.
They going via Wrexham is indirect, not direct, that's why it is slow and one of a few reasons why (in my view) it makes no sense for the Wrexham trains to run through to Holyhead rather than terminating at Chester. Another of the reasons is that, having got rid of most through trains between Holyhead and Wrexham, you might have a case for electrification of the north Wales coast line and hence being able to run electric trains from Holyhead to Birmingham, using the faster route.
Another thought, this time for the Crewe-Shrewsbury shuttle, is there potential to extend this to Chester via Middlewich and Northwich? If Middlewich Station is reopened and the line speed increased, it could create some useful connections between towns in West and South Cheshire and North Shropshire. Direct hourly or bi-hourly trains between Whitchurch, Wrenbury, Nantwich, Crewe, Sandbach, Middlewich, Northwich and Chester.
Interesting idea. Personally, I think the intermediate stations between Crewe and Shrewsbury should be the responsiblity of an English TOC, perhaps as an extension of the LM Shrewsbury-Birmingham service, allowing the Manchesters to be speeded up. The only problem is the second train per hour (northbound) on the Cardiff-Chester axis would have to go via Crewe since it would conflict with the WRX-Birmingham service.
That would require a reversal at Northwich and would not be as useful as a train going northeast bound after Northwich. It would probably be easier to make a sound business case for 3tph between Northwich and Altrincham than 2tph between Northwich and Chester. Off-peak services between Northwich and Chester aren't all that busy on weekdays in school term time.
Even better; if you can run through to Manchester via Northwich and Altrincham it would maintain a through service to Manchester (although much slower) from Whitchurch and Nantwich. Probably couldn't path it though I suppose.
If I could have more intermediate 175 cars so all 2 car services could go to 3 cars and all 3 could go to 4 I'd be very happy but that's not going to happen.
Never say never. If the 175s are to stay with W&B and my earlier suggestion of using the 2-car examples on the HOWL and Conwy valley is unpallatable then the 2-car units are going to be a bit of a capacity issue, so I wonder whether drastric 458/5-style measures might be a possibility, converting half the driving vehicles to intermediates to make 4-car sets.
There's a difference between fast and having good acceleration/deceleration, which is the problem with 185s.
185s have excellent acceleration, far superior to anything in the ATW fleet at present. It's just that they're also extremely thirsty, so they rarely get to show off that feature.
So which is it, can they accelerate quickly or not? If they do, then they should be great outer-suburban units; let's have a few on the Cardiff-Cheltenham service at least (unless a bi-mode alternative is possible, running Swansea-Cheltenham all stops).
The only real differences between the 175s and 195s will be the door arrangement and the latter having more modern facilities e.g. having USB charging points and electronic seat reservation displays.
The door layout is the issue here. I'm not sure you could get the 175's combination of good legroom and not-dreadful window alignment on a unit with suburban door layout without reducing the number of seats. Additionally, since the 195's suburban door layout will lead to shorter dwell times than a 175, it would make more sense for the 175s to make fewer stops. The 195 isn't really a regional-express (read: long-distance) design; the 175 is.