busav8r,
No, they would just go after a handful of captains. Maybe sack 49 (in irony) and then, as is legally allowed in the UK, go after all their assets for compensation.
Possibly then go after the union for compensation too.
I don't fancy losing my house over this. So, legal industrial action only. And in the UK you cannot legally take any form of IA concerning matters that are not directly affecting UK members.
If there's anything really wrong here, it's the UK law.