I can't help but feel that this all now hangs around the status of the Facilities Agreement. BASSA and CC89 were the ones who withdrew. Without a facilities agreement in place, they and Unite are a busted flush in any future BA-Union CC relationship. Unite will know that very clearly, and looking long term will want something in place, even if it means a re-write and a few other concessions "unrelated to the dispute" such as for eg "Any reps will have to be full time employees of BA, and have been elected as a result of a new open ballot, etc."
I still can't understand what on earth persuaded BASSA to withdraw in the first place.