Just for clarity. My lists may be out of date, but from what I have TfW currently have 13 PRM 153's and 13 non-prm 153's. Out of the non-prm ones only 153906 has had PRM lite work completed. So 26 units in total. Are the 4 latest ones still only temporary to cover 769 issues? These being 153918, 153968, 153972 and 153982.
This is the line that doesn't make sense. Are they only buying 8 of the remaining 9 (or 13) non-prm units? Why would they not keep and purchase the current PRM 153's instead of taking on more and having to spend on PRM mods. Also, why buy them and not continue to lease? Unless they have been given a deal they couldn't refuse.
What possible use could TfW have with 21 153's once the new fleet start arriving? The Pembroke Dock line would need 4 and the HOWL 3, maybe 4 if there's any intention of increasing services. I'm guessing the current PRM 153 fleet that is leased will be returned and they will retain the 8 latest editions as the on going 8 in the fleet to cover West Wales and HOWL. Given their reliability and occasional lone working, it will make failures a bit more of a nightmare.