I don't want the MML operator to order new 125mph trains, because the MML is not currently electrified. The IETs are unsuitable for the MML as they are due to the low power in diesel mode, BUT is there any other reason why they would be unsuitable? Since the East Coast infrustructure is not ready for the enhanced service Virgin/Stagecoach had planned the full EC fleet (IETs + IC225s) won't be needed to start with so the options are:
- leave part of the EC fleet idle in sidings until the infrustructure is ready for the upgraded ECML service or
- find an interim use for the trains EC cannot use, until EC is able to use them
I prefer the second option. Due to the lack of electrification, the class 91s probably cannot be used elsewhere, so the sensible thing in my mind is for the EC operator to hold onto (at least) enough IC225s for the proposed Edinburgh fast services and find a way of using the IETs elsewhere. Re-marshalling the formations of the class 801s and 5-car 800s (EC will be needing most if not all of their 9-car 800s) to produce a mix of class 801s without the diesel engine and 7/8-car class 800s with diesel engines under all but the driving vehicles should provide a fleet with a power:weight ratio that at least matches EMT's IC125 sets. That would provide IETs to replace the MML IC125s, with the Meridian fleet staying put.
Hopefully, by the time the East Coast upgrades are complete the GW electrification to Bristol and Oxford will also have been done, meaning GWR can have a new fleet of electric-only IETs for Cardiff/Bristol/Oxford and release a few bi-modes to allow EC to have its IETs back from the MML. Later; you electrify the MML, order a new fleet of electric trains and cascade the IETs (and Meridians if they have life left in them by that point) to CrossCountry.
Ordering new bi-modes for the MML is madness; there are enough class 800s around they just need a bit of remarshalling and cascading.