London Underground power control staff to begin eight-day strike
Power control staff on London Underground are due to begin a strike later after talks to resolve a row over pensions and working conditions failed.
Members from three unions - Unite, Transport Salaried Staffs' Association (TSSA) and Rail, Maritime and Transport union (RMT) - will walk out from 20:00 BST until 19:59 on 9 July.
The RMT said the dispute was an "all-out attack" on power control workers.
London Underground said the strike would have "no visible impact".
The long-running dispute involves workers who transferred to other organisations years ago coming back under London Underground management, but with different working conditions.
Mick Cash, acting general secretary of the RMT said: "These staff are effectively the national grid for London Underground and this action will have the most severe consequences for Tube operations but has been forced on us by management wrecking the earlier talks."
A Unite spokesman said: "The travelling public faces the very real prospect of their journeys being disrupted because of the irresponsibility of the management."
A previous strike by the workers, who distribute electricity across the network, was called off to allow for talks, but the unions said these had broken down.
Richard Jones, London Underground's head of command and control, urged the unions to continue discussions "rather than threaten pointless industrial action".
He said: "Due to detailed planning there will be no visible impact on the network should the strike action go ahead."