Yep this is the 11 month temp contract.
BA have their hands tied by the union, they're not allowed to recruit for permanent crew into LHR WW, as there are so many people waiting on other fleets for a transfer. They compensate by recruiting for temporary contracts to allow for crew movement and then offer the temp crew positions in other fleets if they're available. If they transfered into LHR WW when ever positions were available, rather than offer temp contracts to cover short falls, then all of BA's experience would be at LHR due to the seniority system they operate. Therefor they have no choice but to let the current WW temps go. It will be the same story when my contract expires I'm sure.
Hope that makes sense 747.