Gentle correction there, John. The Pendies are AC electric, it's the "Voyagers" - Class 220, 221 and the Meridian branded Class 222 spin offs which are the next gen diesel high speed trains. The Class 800 "IET" being rolled out on GWR are bi-mode hybrid sets in that they are primarily intended to run off overhead 25kv supply but also have underfloor diesel engines fitted for working off the electrified network. Don't think anyone has built one of these for Trainz, yet.