I'd like to know as well. I've spoken to several UK collegues in the BMC, and what struck me is that the most heard argument is 'we are discriminated against'. Well that goes for us too: you earn in pounds what we do in euro's, you have a pension based on your last earned salary, where ours is based on average, you have less early shifts than we do.
So I cannot imagine Balpa is supporting the discrimination claim. Please let us know what you are preparing to strike for. Support from our side may be larger than you think!