London Underground train drivers are set to strike next month in a dispute over pay, the Aslef union has announced.
As well as Tube drivers, instructors, management grade staff and those in the engineering section are set to take industrial action.
The union said train operators and management grade staff would strike on 7 and 12 November, and those in the engineering section for 24 hours from 18:00 GMT on 1 November.
Transport for London (TfL) said it was “disappointed” by the move.
Finn Brennan, Aslef’s full-time organiser on London Underground, said: “We don’t want to go on strike – we don’t want to make travelling in and around the capital more difficult for passengers and we don’t want to lose a day’s pay – but we have been forced into this position because [London Underground] management won’t sit down properly and negotiate with us.”