The dispute is over the sacking of two drivers Union bosses have revealed details of a series of Tube strikes due to start in less than two weeks.
Tube drivers voted in favour of industrial action in a row over the sacking of two colleagues.
The Rail Maritime and Transport (RMT) union said the first walkout was planned for 16 May, with another five before the end of June.
Transport for London (TfL) has previously denied the two drivers were unfairly dismissed.
The RMT has instructed drivers who are members of the union not to turn up for shifts on six periods in May and June.
The walkouts are planned for between nine and 24 hours from Monday 16 May to Friday 20 May and again from Monday 13 June to Friday 17 June.
RMT General Secretary Bob Crow said: “It is the abject failure of London Underground (LU) to recognise that their policy of victimisation of union activists has been well and truly rumbled… that has left us with no choice but to name these dates for strike action.”
He said LU should “accept they have been found out, get these drivers back to work doing the job that they are being paid to do and bring an end to the constant harassment of union activists whose only crime is fighting cuts to jobs and safety.”
The RMT said almost two-thirds of its members voted in favour of industrial action over claims Eamon Lynch and Arwyn Thomas were sacked because of their trade union activities.
Both men have taken a case of unfair dismissal to an employment tribunal.
TfL has described it as “absolute nonsense” to suggest the two men were dismissed unfairly due to their union activities.
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