As to honest managers, if the suspended and sack reps are found to have been treated unfairly, then what should happen to the BA management team, or do you count removing the problem of a strong union, just part of the bigger picture of protecting the business and therefore for the greater good?
I think you'll find the process that results in suspension/sacking by managers is somewhat more robust - normally - than the one that governs statements and instructions and even actions by union reps.
I once had had a T&G rep complain to me that disciplinarys were "fixed" as almost all of them resulted in some sort of sanction - I pointed out that it was more due to the reasonable process that meant it never got as far as a disciplinary unless there was "just cause" ....
Personally I'll be surprised if BA haven't been meticulous about both the process and the sanctions applied.