The suggestion that the remainder are being split between Slough, Weymouth and Weston makes sense. Weston are releasing StreetDecks for the NewPower programme, and clearly the plan is to repower the remainder left with West of England. Weymouth need - at least - to replace their remaining B9TLs, and Slough need more vehicles for the X74/M40 uplift. By my reckoning, that's 18 for Weston, 8 for Weymouth and 4 for Slough at minimum (so 30), with 11 E400 MMCs going to Glasgow, and with 52 of the type up for grabs, presumably more are going to Weston/Slough/Weymouth!
In addition, I wonder if Tourismo 24212 is actually headed for the Aberdeen coach fleet?