Tube commuters have been warned of major disruption on the London Underground next week because of a planned strike, which will hit three Tube lines.
Members of the Rail, Maritime and Transport union (RMT) and drivers' union Aslef will stage a 24-hour walkout on November 7 on the Central and Waterloo & City lines.
This will mean the lines will have no services all day.
RMT members on the Piccadilly line, which serves Heathrow Airport, will strike from noon on the same day, affecting services for the rest of the day and on the morning of November 8.
The disputes involve a breakdown in industrial relations.
Scores of extra buses will be deployed to help passengers affected by the industrial action and Transport for London staff will be based at stations to offer advice to people with their journeys.
Nigel Holness, director of network operations at London Underground, said: "The strike action called by both RMT and Aslef is totally unjustifiable.
"We will keep customers up-to-date with the latest travel advice to help them re-plan their journeys and will continue to talk to the union leadership in order to try to resolve these disputes.
"I urge the unions to call off this entirely unnecessary action, which will only cause disruption to our customers, while those discussions are ongoing."
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