(21 May 2022, 3:05 pm)Jimmi wrote Why is the suggestion to allocate StreetDeck's to the X21?! They've already allocated some to the service and they were removed because they were supposedly deemed unsuitable to the route. B5's are probs best left on the X21 certainly for now at least. Also what would be the sense be in allocating the non standard B5s at two different depots?!

Depends who you ask though.
MG said during one of the Facebook lives that the StreetDecks were fine on the X21 and they were only removed due to 'operational reasons', presumably needing somewhere to dump the B5s.
However, Dan has said they were removed due to their unreliability, although I'm pretty sure he doesn't comment on here in an 'official' capacity.

I do think, having used them extensively, the B5s are a better fit to the X21 than the StreetDecks were, although I don't think any of the new 4 cylinders have ventured down these parts, only the 6 cylinder, which seemed to cope pretty well.