I assume that during the strike BA will be working staff to CAA limits rather than industrial in order to maximise the efficiency of the aircraft and crew and that this would also include sweeping aside the Spanish practices.
I suspect that this may come as a bit of a shock for those crew who voted to strike but change their mind and came to work. They will have to decide what they are going to do when the situation arises rather than running off and phoning BASSA for a decision.
With all the volunteers on board you might actually have a bit of a laugh down route. Good luck to all.