TSSA Union staff strike dates announced
Dates: 20th, 26th, and 27th November 2025
Location: TSSA HQ, 17 Devonshire Square, EC2M 4SQ
TSSA Union staff will walk out over three days in November in a row triggered by bullying and intimidation by managers at the trade union.
From 20th November onwards, the staff will also take part in work to rule.
A recent strike ballot saw GMB members working for TSSA vote 86 per cent in favour of industrial action, on a turnout of 73 per cent.
This strike is an escalation of a longstanding row about the union’s toxic workplace culture, overseen by General Secretary Maryam Eslamdoust.
It will also mark the second time that TSSA staff have taken industrial action over bullying and intimidation by management, and a lack of fair process.
Andrew Harden, GMB Regional Organiser, said:
“The bullying and intimidation GMB members working for TSSA are experiencing from management is seriously affecting their mental and physical health.
“As a trade union leader, you would expect Ms Eslamdoust would be the first to call out this type of treatment, making her own behaviour as a manager all the more shocking.
“TSSA’s leadership have made no attempt to engage with staff representatives to resolve the dispute since the results of the strike ballot were announced.
This cavalier attitude shows an irresponsible level of contempt towards staff and TSSA members, who will suffer as a result of avoidable strike action.
“TSSA leadership urgently need to address the poisonous culture in the union and implement the Kennedy Report in full.”
