It's unfortunately what happens with having such an old fleet of trains, most of tfws units were built in the 1980s and 1990s then newest units 175s are over 20yrs old now.
As a result reliability suffers
The golden spanners data shows reliability to be, at most, only loosely corrolated with the age of rolling stock. Despite a big fall when Stagecoach lost the franchise, I think SWR's 30 year old 158s and 159s are still the most reliable DMUs in GB. Meanwhile, Northern's nearly-new Cavity units (class 195) are not much better than a 175; indeed the 175 might be the more reliable of the two I forget.
from experience tfw are struggling with unit reliability which always worsens in the warm weather. Tfw are trying to get more units until the 197s come into service, they are sourcing more Mk4s but it all takes time.
If I recall correctly, the golden spanners data showed TfW's 67 + mark 4 combos to be less reliable than the Sprinters. Hopefully that will improve as it's early days yet but it's worrying that the only true long-distance stock in TfW's fleet plan isn't looking very reliable at the moment.
I'd need to check the figures to be sure, but I don't remember there being all that many diesel fleets that meet the 15,000 MTIN threshold for rolling stock reliability no longer being a significant factor in overall service reliability. On that basis, are we asking too much to expect a reliable service on a line that is not electrified?
In tfws defence there were some extra rolling stock planned such as the 230's & 769s but they have proven to be a terrible choice. One type in service but very temperamental the other type still sitting in some sidings after a 3yr delay.
Given the utterly stupid suituation that existed in the 2010s (a hard deadline for PRM compliance in 2020 and a no-growth ATW franchise until 2018) there didn't seem to be any other (indeed, without the benefit of hindsight we now enjoy, my opinion before the refranchising was that a large number of 769s should be ordered to replace the Pacers AND ATW's 150s). There was unlikely to be sufficient time to procure new DMUs (and that would have conflicted with ambitions for ValleyLines electrification (which absolutely could not possibily be delivered by the 2020 PRM deadline) anyway) and Porterbrook were claiming they could produce 769s in very little time - potentially allowing the Pacers to be replaced by 2020 with stock that would be able to benefit from electrification when it arrived. That seemed a really good idea to me at the time (the awful reliability of the 769s aside, it still does).
It was posted in a Wales online article a few months ago, tfw have said this is the plan on the valleys network
Somebody really did need to bite the bullet,and either get the 14x evolutions, or put in an order for a no-frills PRM compliant eco-pacer type unit,which could do a similar job,but with much reduced running costs.
No, that would have been madness (in the case of TfW anyway, who were the last operator of Pacers). Apart from 2 out of 3 Pembroke Dock diagrams in some summers, I can't recall ATW deploying Pacers outside the SE Wales Metro area on a regular basis. Given that the Metro will include electrification, spending alot of money upgrading diesel only units (or, worse, buying new diesels) doesn't make much sense to me. With hindsight regarding the 769 issues, I don't think there was alot TfW could have done other than keeping some 143s on under a PRM exemption and use them only for strengthening PRMed Sprinters)
Love them or hate them, but the pacers at their time were made the way they were to keep running costs down.We need a modern day upgraded version still, to fill that niche.
Ian Walmsley's latest Modern Railways column makes the claim that Pacers were not actually the cost savers we thought they were. According to the article, if you look at it on a cost-per-metre-of-unit basis and factor in the cost of major works to replace doors and brakes (the latter because of frequent SPADs) they were no cheaper than Sprinters.
The treatment that disabled people get on DOO trains is atrocious and massively dubious in terms of equality legislation. It's not a good example to go by
I think there is an issue even when a guard is provided when you have stock like the SWR/SWT class 707s or GA's huge Aventra fleet - units which run in pairs but aren't gangwayed so in effect one unit is either unstaffed or has only the driver who would be in no position to assist in good time if a call-for-aid alarm was activated.
Regarding toilets at all ValleyLines stations, I think in recent statements that has been downgraded to something which involves toilets at more valleys stations than in ATW days, but not all stations.