Oh dear, Duncan is still dishing out duff (and incomplete) info on the BASSA Forum.
For the 1000th time - BA cannot sack you for taking part in a lawful dispute - no one can!
Yes, they can Duncan - it's just that the sacking would be ruled illegal and you could make your way to an employment tribunal to seek compensation. Could take years though and has a limit on the payout that is probably worth less to most than actually keeping their jobs.
Also, if BA can prove (or a court ruling accepts) that the dispute is over the same issues as last time, then the strike action would be ruled illegal. Now, BA could sack you and you'd have no comeback.
Beware Duncan glossing over the very inconvenient truth and make your own decision on whether you wish to accept the risks that come with striking.