It's becoming an all-too familiar pattern on trains. Managers in depots get out of control, presiding over a culture of petty and arbitrary discipline, interpreting procedures and policies punitively and acting like tinpot authoritarians. RMT drivers ballot for industrial action to stop this culture, strikes are declared, negotiations take place at Acas, trains managers promise to wind their necks in, and strikes are suspended.
A few months later... the old problems have returned and we're back to square one.
This appears now to be the case on the Central Line, with drivers arguing that management have reneged on promises made at Acas.
Maybe the only way management will learn to change their ways for good is when they realise our strike ballots aren't just idle threats, but that we actually have the ability to stop the job.