Otter girl
I, and many others, are saying be careful about what you sign up to regarding court cases.
If all goes according to plan and BA are found liable for costs all well and good.
Now look at the other side of the coin
BA are awarded costs against BASSA.
BASSA have already had a strike, I understand they are paying strike pay of £30 per person per day and let us say the strike lasts 5 days - say 10,000 go on strike.
That is £300,000 per day or 1.5 million for 5days.
Now, I don't know how big BASSA's coffers are but the costs, including your own, have to be paid.
The costs will be taken from BASSA first and when all their money is gone the court will ask the individual petitioners to pay the remaining costs.
If BASSA are sensible they will offer some indemnity to those petitioners by, say, taking out an insurance policy or getting an agreement from another party (Unite?) to pay any shortfall.
I don't receive BASSA communications but I feel sure they have advised you of the possible outcomes.