Atlas
Welcome to the forum where you can ask open questions like that - I doubt that you could do it elsewhere.
Clearly and understandably you are concerned about the ramifications of your future working life.
Firstly, in the past, BA have made arrangements for crew who wish to report to be kept away from any picket line that there may be. They have done this via remote parking, use of legislation re where picketing can occur, and the use of buses that are obscured from external eyes, preventing recognition of those inside.
Secondly, it is illegal to strike if you are not a member of the union calling a strike. So, resigning from the union would give you a legitimate reason (if asked) to say you worked. It would possibly be prudent to avoid such confrontation by saying that you were on leave or something, depending on whether you wish to put your head above the parapet.
Be reassured however though that in the next few days BA will be writing to you explaining the facilities that they will put in place to enable you to report securely for work. Furthermore, rest assured that anyone else you work with will be in the same boat and of the same opinion as yourself.
Well done
