Off of Wikipedia and my own understanding
GWR:
- 21 x 9 car bi modes [801*] (originally electric but switched due to wiring delays)
- 36 x 5 car bi modes [800]
- 22 x 5 car bi modes [802] (separate to IEP)
- 7 x 9 car bi modes [802] (separate to IEP)
Replacing: HSTs and 180s (and some Turbos as well IIRC)
VTEC:
- 12 x 5 car electric [801]
- 13 x 9 car bi modes [800]
- 10 x 5 car bi modes [800]
Replacing: HSTs and IC225s
Then also, Hull trains will receive 5x 5 car 802s, and TPE will receive 19x 5 car 802s. There is also speculation that there will be a few more 5 car 802s for GWR to make up the difference by them receiving only 387s and no 365s.
*or maybe 800, not sure know