New first seats on the refurbished 777-300 (8F) and slightly different but also pretty new seats on the 787-9 and 787-10 (also both 8F).
There are more F seats on the A380 (14F) and I certainly find that cabin spacious and comfortable although the decor is getting on with a bit of wear showing. It is the one cabin where you can fairly comfortably “buddy dine” with a companion if you wish.

The newest business class seats are the club suites (which have a door) on the 787-10, A350 and the refurbished 787-8s and 777s. Older club world seats are on the A380 but many people still like them particularly if you get the upstairs window seats which have large bins beside them for storage. LGW flights are pretty well all old CW style unless the aircraft is substituted for some reason.

If you are using a 241 then you should find it relatively easy to get business class seats to a suitable destination as they release 4 seats on every flight and moreover the 241 can book into most I fare bucket availability. F redemptions are much harder to get without a joker or a GUF (both of which can use A bucket) due to the much smaller number of available seats nowadays. Certain destinations (e.g. IAD and ATL) are more likely than others.