Litebulbs link makes very interesting reading -
From paragraph 26 -
During June 2009, there was a serious disagreement between the two union branches with the result that it was no longer possible to conduct meetings at which both branches were present. In late June, BA put forward a proposal which included specific reductions in crew complement. Two days later, Unite put forward a Pay and Productivity proposal which it claimed would save £173 million per annum. Although this proposal included some reduction in crew complements, these were not as significant as the BA proposal. BA then analysed the costings within the union's proposal and found that it would result in savings of only £53 million. It was therefore unacceptable. In July and September, there were several attempts at further negotiation, some involving ACAS. A particular difficulty was that the two branches of the union were still not prepared to work together.
From paragraph 29 -
There has, however, been considerable dissatisfaction both as to the effect of the new arrangements on working conditions and also with the manner in which the changes were effected. The judge recorded that many staff were resentful of the decision to impose the changes rather than to negotiate them. As to this, the judge appears to have been of the view that staff had not realised how much difficulty had been caused by the refusal of the two union branches to work together.