The 2011 intake are all unfrozen next year. There's a whole load of Airbus F/Os waiting to go long haul as they can't take the relentless nature of short haul any longer, partly due to the BALPA agreed change to the duty-rig. There are 80 FPPs finishing training, and there's only one fleet they can join.
Denying unfrozen F/Os their place on LH isn't going to go down well.