Sorry AVFlyer but I don't agree with your assessment. I don't see how it benefits BA to stop this strike from occurring now. At present, Unite stand to be sued and any strikers BA want off the payroll sacked if Unite go on strike under the current ballot. Why would BA want to let them off the hook?
BA have already lost revenue from advance bookings and preventing the current strike action now will allow Unite to reballot, get the same result and we'll all be in the same position in a few months time. Unite will have hit advance bookings over the summer and have a valid strike mandate.
It would make much more sense if this did relate to the 2010 dispute and BA were seeking advice \ contemplating suing for lost earnings. This would be very different from seeking the injunction to stop the strike (which ultimately they lost).