I also agree that Unite needs to make an appearance at the table - and soon.
Why bother? - Look at it from BA’s point.
Call Unite in, reach an agreement, shake hands on it with Unite promising to put it to the membership vote. Then don’t do any of that as CC89 throw a hissy fit with BASSA right behind, so go straight to ballot for strike again.
Ok, so call in CC89 and BASSA and talk to them directly without Unite, oh no can’t do that, even if they actually turn up for meetings, they won’t sit in the same room as each other.
Really, what is BA to do? The Union is broken, it doesnt work as intended.