In BHARAIN LAD's trip report back from FRA (BELOW) he does a walk around the A380 and the BA staff say that the rear mini cabin will be used for groups.
Whilst the comment is very clear in his Video trip review, I have no idea if this is official BA policy or galley tattle.
I would go as far forward as possible, also consider how full the aircraft should be as you might do better grabbing a lower deck window / aisle if it is not too busy.
Just a thought but are BA going to sell the A380 FULL or up to the point where a 70J 747 could do the run if the A380 went tech?
http://www.flyertalk.com/forum/trip-...w-a380-hd.html