Is there any sign of seat direction on the seating plan? Once you get the aircraft code, that'll tell you for certain. You're looking for 76Z instead of 76A.

http://www.flyertalk.com/forum/briti...-aircraft.html

Quite a few days this week it's been a longhaul, so it's a good possibility.

http://www.flightradar24.com/data/flights/ba463/