For nearly two years, Waterloo & City line service control staff have been refusing overtime in pursuit of their entirely justified claim for higher pay to reflect the complexity of their work. Nothing doing. Management didn't care.
So they stepped it up. Balloted for strike action. Got a 100% Yes vote. Put on a 48-hour strike.
And guess what? Management came running to ACAS and have now agreed a review which should lead to a pay enhancement.
The lesson is obvious: if we want to win, we must show willing to take action.