I've just asked on Facebook regarding these buses, and had the following replies.
T21 TYB is off the road at Longton Depot.
WA09 FHL is in Longton having work done.
YJ67 GBX is in Cannock having repairs to the body work.
YX63 LGG needs some gearbox work and is at Macclesfield.
That might partly explain why the Cheshire Versas have moved back to Staffordshire, with the exception of one vehicle. WA09 FHL was last used in Cheshire but it didn't sound that healthy when I last saw it.
It's also interesting that the 64 reg Enviros have gone back on to the 82, when previously they weren't deemed to be good vehicles for the route due to their hill climbing ability. It sounds like the ex-Centrebus ones have different engines, so they might be a different matter.
I have noticed there's been quite a few vehicle swaps between Macclesfield and Wincham. Quite a few of the Solos usually at Macclesfield have ended up on Wincham routes, before going back to Macc.
Interestingly I've just found out tonight that next week D&G service 12 (Crewe) isn't running in the evenings Wednesday 27th Thursday 28th & Friday 29th due to D&G operating a Saturday service on these dates, usually Monday-Friday these late number 12s operate. The evening services are still used for hospital staff and visitors, and Cheshire East council subside the services at night, would be interesting to find out if there's anything in the tender contract about the service provision over the Christmas period.
D&G are inconsistent with that period. In most previous years it's been normal weekday service for the Cheshire East contracted services between Christmas and New Year, but there has been one previous occasion when they resorted to a Saturday timetable.
It also affects the services available to Macclesfield Hospital in that period.