I'm not quite sure what the drivers are doing to them, but they're certainly dropping dead like flies at GWR

It's a great shame as I think they're a fantastic train. As soon as the 197s came in TfW really threw in the towel though.
Internally, they are fantastic, i'll give you that, but mechanically they've always been absolute dogs. It's not the drivers it's those transmissions and cooler groups. The Welsh Marches have some climbs, but nothing like Devon and Cornwall, and with the Class 175's abysmal tractive effort, drivers will be having to rip their gut out on those all stations services to fight half of those climbs from standing starts. The Class 175 is as fragile as spun glass and needs long-distance cruising on dead level track preferable with a cold northerly blowing. It's a real shame that Transpennine didn't take up the option for extra-trains in their Nova 1 order to allow Class 185 replacements. The 185 might be a heavy beast, but it's a powerful, high acceleration, mechanically practucally indestructible, natural born hill climber. It would have been ideal used in pairs or reformed into a smaller number of 4 car units. They were originally to be 4 car units, hence why the carriage numbers end in 1, 2, and 4, missing a Motor Standard. They're also, I think the only train with doors a low dwell time ⅓/⅔ that have an intercity layout.