I dont think so. Remember, industrial action is entirely legal with a mandate of a proper adjudicated ballot, which it was.
The industrial action you refer to may well be legal BUT you will still be in breach of your contract of employment for which your employer may sack you. You can ALL be sacked on day 1 of the action and then be re employed (if you want to be) on a new set of terms and conditions. This can happen and it is legal. I expect WW to shut the airline down on day 1 of the action so that all staff will have money deducted from their wages - this will make CC very popular indeed. You had better be prepared for a big punch up because if the dispute is not settled there are going to be some fists flying.
The poor unsuspecting public as always will take the brunt of any action. When the dust settles and the new dawn arrives you had better hope they come back to BA.