Commuters are set to face travel chaos this week as staff at the Southern Railway begin a walkout at the same time as a tube strike in the capital.
Hundreds of thousands of passengers will be disrupted by the industrial action.
Southern Railway and London Underground will be hit from Tuesday because of long running disputes over issues, including staffing and safety.
Members of the Rail, Maritime and Transport union on Southern will strike for three days from Tuesday in protest at changes to the role of conductors.
The drivers’ union Aslef is due to start an overtime ban on Southern from Tuesday ahead of strikes later in the month and in the new year in a row over driver-only trains.
Southern is taking legal action to try to stop the strikes, but if the action goes ahead, services will be crippled.
RMT members on London Underground’s Piccadilly, Hammersmith and City and Circle Lines will strike for 24 hours from Tuesday evening.
Southern warned passengers to expect “severe and significant” disruption to Southern and Gatwick Express services every day from Tuesday.
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