RMT drivers on the Piccadilly Line are currently balloting for industrial action, with the vote due to close today (Thursday 21 June).
The dispute has been prompted by what the union calls a complete "breakdown in industrial relations", with management adopting an increasingly disciplinarian and authoritarian approach, including obstructing union reps from carrying out basic trade union duties. Piccadilly Line management has also failed to honour agreements made in previous disputes.
Aslef is also balloting its Piccadilly Line membership; its ballot will not close until July. Should RMT's ballot meet the threshold requirements and return a majority for strikes, a discussion will need to be had amongst RMT reps and activists around whether the union should wait for Aslef's ballot to close, in order to coordinate potential action, or launch action of its own using the momentum of its own ballot.