VK
you forget that the PCCC are not in dispute with BA, so have no involvement. Moreover, at present the PCCC are not recognised by BA as a negotiating body. That is not to say that they may not have influence, just that in the current setup it would seem they have no axe to grind.
I'm more interested in the legality regarding the way in which the branches intend to determine whether to put the deal on offer to the membership for ballot. Maybe the union guuys on here could comment on it. If the branch constitution allows this sort of thing to happen, it really does show that trade unionism in the UK hasn't moved on since the 1960's and 70's and has a whiff of corruption about it.