MissM and PC767 have made excellent posts with merit in some suggestions.
For me the whole problem is that ten item wish list. I'm struggling to think of any strike which had such a wide remit. Given that a strike is the last and nuclear option then they always have a single clear issue which if resolved would solve things. One of many problems is when would BASSA ever stop? Points x, y, z? a & b but not c? Let's assume that BA will never concede all 10 points then BASSA have a no win strategy.
Personal view: I can't see BA conceding any 'control' over NF, that's what this is all about, who runs the company. The rest could be discussed but I can't see BASSA settling as anything now is worse than when all this started.
BA aren't an altruistic charity, they are a business and the unions have to negotiate accordingly.