Tube union leaders today ordered a 24-hour strike on the Victoria line and threatened more to come in the run-up to Christmas.
The walkout by RMT train drivers will take place from 10pm on November 27 until the same time the following day.
The strike was originally scheduled to take place in September but was suspended when the union believed it had reached a deal with London Underground at conciliation service Acas.
The Victoria line, an RMT stronghold, is used by some 600,000 passengers a day.
An RMT spokesman said if the dispute over a range of issues including a “fundamental breakdown in industrial relations” was not settled it “will consider further strike action in December”.
Drivers from the rival Aslef union could also refuse to cross picket lines, bringing the line from Brixton to Walthamstow Central to a standstill.
Mick Cash, the RMT leader, accused Tube bosses of having “reneged” on a series of pledges made at Acas.
He said: “LU’s actions are deliberately provocative and the announcement of action later this month is solely down to their childish behaviour.”
Transport for London, parent company of LU, said: “We have been making progress with the RMT on these issues and are disappointed they have chosen to call this action without notice.”
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