For the 1000th time - BA cannot sack you for taking part in a lawful dispute - no one can!
This is the biggest single bee I have in my bonnet these days, and this “you cannot be sacked” falsehood still lives clearly.
It’s a real shame that a union fails to speak the truth to its own members, a real shame. Be the lie originating from a supreme ignorance of the law or a supreme disregard for its members, its bad either way.