It would be a drawn out process. Any IA ballot MUST be by postal vote, this means from issuance until announcement of a result is typically 3 weeks if fast tracked but more realistically a month to allow two full weeks for responses. That comes after the failure to agree process has been exhausted. The 2019 action was announced after all of this plus an injunction by BA which they lost and an appeal on that decision which, again, they lost. IF it got that far they would certainly do the same again, anything to kick the can down the road.