LHR-YYZ-LHR in F in mid-Nov, both on 777s.
Outbound flight had 15 available seats (4 A seats, 3 middle pairs plus 3 against the other windows - K?), with 4K actually blocked off with a wardrobe style door and something like "Crew Use Only" on the door. Full AVOD and a nice big touch screen for IFE.
Flight back had 16 F seats, i.e. no blocked off crew rest area, and had what I took to be "normal" non-upgraded IFE, which I didn't actually use.
I can dig out the dates and flight numbers if anyone has a means of tracking down the actual aircraft on these.