G-VIIA, which has been in storage at CWL since April 2020 just arrived back at LHR and anecdotally has been listed as in the new 8F/49CS layout which means all LHR based B77-200ER 4-class aircraft now have CS interiors.
The only remaining 4-class 14F B777 aircraft are the 3 LGW based aircraft, 2 of which are in storage, and the 3rd serves LGW - but they are scheduled to serve Caribbean routes out of LHR for May / June'22

Pilot37