After a bit of chatting, and a couple of drinks, it was time to test out the lie-flat seats signature ability. I extended the seat to flat (my one negative would be that the seat is somewhat higher than the footrest so it’s not exactly even at the far end but, though this seemed odd, it didn’t cause me any problems).
If these are the same lie-flat seats as BA mainline used to have (i.e. New Club World) then the foot-stool height is adjustable by gripping a lever and will rise to the same height as the main part of the seat. Not at all obvious how to do this, though!