(31 Jul 2022, 6:56 pm)L469 YVK wrote I doubt 6356-63 will end up on any non 'X-Lines' routes.

I wouldn't be too surprised tbh. I know you expect the X21 but they might feel the B5's are better. They're no different really to the Green Arrows Enviro 200 MMC's which are X Lines pretty much in everything but branding.

1 to Washington
7 to Riverside for the 58
East Rider B9's for the 57
6377 to Riverside as a X10/58 spare

That could easily work aswell but it's all guessing tbh.