What is certain is that unless UNITE can mobilise more people to take strike action than they did last time, any strike is doomed to failure. BA could do nothing and let the strikers wither on the vine.
The whole ethos of IA is that it will prevent the company from trading, the last strike failed to do that. Should there be more IA it has to achieve more than the last time. As IA continues the evidence from previous strikes in the UK is that support wanes.
Should BA do nothing and ignore the IA except to stop strikers pay, what could UNITE do about it? The strikers would quickly lose the ability to pay the mortgage etc and would have to return to work.
Given the weak and ambivalent support at the last strike I wonder what UNITE feel they can achieve with more IA?