An interesting addition to the discussion, here and on another similar thread. At least you got some sort of an explanation on the Gold line, which is more than I achieved!!
Now the Big BA Lottery question is whether you select seats in F (when/if you can). I fear that's the mistake I made, by not selecting them at T-48 when we first saw them (and only them) in MMB. I have long since stopped trusting LGW 777 seating arrangements, so lacked the courage of taking the plunge!