Think about it
BASSA/UNITE have led you up the garden path for their own political means. It is undeniable. Of course, the lefties among the 'group' are aware of it and it's their duty to convince you otherwise.
Why not look ahead and plan you life and that of your family assuming that you will remain an employee with BA. Please do not look back in anger when it's too late.
Maybe take your anger and frustrations to UNITE/BASSA that have dealt with this in such a despicable manner (unquestionable!), and head to another union that will better represent your cause.
Think about it.