Thinking on a better use for Mk5s might be North Wales, allowing the Mk4 sets to be binned off. That has long been a haven for loco-haulage of various types.
Yes, but of course each time loco-haulage has been used it is because there aren't enough units.
Not in the future case in Wales, there has been a deliberate choice to use 67+Mk4 sets because of the InterCity ambiance. As new units are on order, they could just have ordered a few more if they wanted units.
GWR and ScotRail seem perfectly relaxed about operation of HSTs with their existing gear settings and resulting acceleration for some years to come in places where there isn't an inch of 125mph track.
In my opinion it would make more sense to get an upgraded desiro, maybe a bimode version of the desiro verve? Siemens have built a diesel desiro so they can probably build a bimode desiro and the desiro verve has end doors and is more intercity. Plus it will be easier on maintenance as they already have desiros.
Looking at TPE's financial performance, picking 3 smaller fleets may have been a mistake...
Also do the 802s have the range to do the 68/Mk5 routes? 802s have upgraded fuel tanks but are they big enough?