I'll be on board BA 212 from BOS-LHR soon, and noticed it's listed as a 777 rather than the usual A380 I've had on this route. I was looking at BA's seatmap for this 777, and it doesn't seem to match any of the 777s on SeatGuru. BA is claiming Club World is rows 10-14, PE is rows 18-20, and Y runs from row 21-35 with an exit row in row 22. I can't see F on the seatmap or when I make a dummy booking, but I assume it's a four-class aircraft if Club World starts at row 10. Can anyone advise which variation this might be?