I do not think industrial action is the key here.
As others have said, for management to truly understand how bad the situation is, everyone needs to come together and not accept working off RDO and A/L. The cancellation rate would be astronomical, and this shock tactic would work.
Stickywastegate,
Protected industrial action can include such things as not working on RDO's and/or Annual Leave! That is probably the type of action that would be being considered and would be most effective.
