So TPE have a bunch of 20 year old DMUs that still work fine yet are getting new trains, whilst GWR are having to deal with much older DMUs but seeminly have no hope of getting a new fleet.
GWR is still due to get new trains under Project Churchward, which is likely to deliver around the same time as the new TPX trains come onstream.
TPX is getting new trains because the route is being significantly upgraded and the existing fleet wouldn't be able to fulfil the objective of the upgrade.
GWR are in the position where they are actively having to cancel a tonne of services all the time and now have had to make a timetable change all because of their rolling stock situation.
Something tells me TPE aren't in a situation that bad - yet are getting new trains for upgrades.
GWR are in the process of receiving a bunch of class 175s – the only reason they are having the current problems is because the 175s are in a worse state after being in storage than expected. This was unforeseen and so of course they couldn't speed-run a 5-year procurement process for new trains in a few weeks – and it should only be a temporary hiccup anyway, the 175s should be brought up to full working order soon, meaning that GWR will again have a full fleet so no further cancellations needed.
And when the GWR DMUs (158s and 165/166's) would be coming upto 45 years old.
They are due to be replaced within that window.
As someone pointed out, we don’t know the operational set up as 5 car extra services between York and Manchester might grown the overall capacity.
Also would 10 with SDO and then split at York be options for Scarborough and Saltburn services?
Running services through the core at 5+5 and then splitting/joining at York would cause a number of problems, including (a) being too long for some stations along the way, (ii) increased risk of delays and disruption, including blocking platforms in York when waiting for a late-running portion, (3) unless you're going to then order
more trains to run through the core, you're not increasing capacity, just consolidating it into fewer, longer trains instead of more frequent but shorter trains, so I'm not sure what the gain is. Splitting/joining is a real headache for the railways, even though it appeals to armchair planners, which is why it is used very sparingly.