I agree that there isn't a case for the extension of Cardiff-South West services to Swansea although the argument about subsidy is a silly one. The units should be used where it is most effective. So if there is spare units if the Great Western franchise, and overcrowding on others, such as Northern. And vice versa. The units should move to where the demand is and where the greatest benefits are, we should all be trying to get the best out of the rail network, not argue about them being our resources so exclusively for our use, as happens to often.
Which is why the
FGW▸ units should be left to do what they are doing now. There is sufficient to cover the services as things stand without them being sent away to Northern or being used to move Mrs Pugh and her cat to Pembroke etc. There are no spare diesel units on FGW. Anyway Northern got some nice useable 142's back they should be gratefull for that.
The aregument about subsidy might sound silly to you but to my mind where we are entering the world of increased regional devolvement for transport provision it becomes to my mind a lot more relevant than previously. As already mentioned it was used as a lever to remove Wales and Borders /
ATW▸ services from Penzance however some of the units were chivvied out of the W&B franchise in order to maintain service levels / capacity.
If the
WAG» is successful in its bid to get the Valley Lines electrified (which should happen in my view) then that will free up a lot of 15x units which can be used for increasing services to / from and beyond Swansea using ATW crews and resources. The 14x can then make its way into the scrapyard in plenty of time to beats the DiPtac requirements post 2020.