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Travellers in the capital faced chaos today due to a walkout by London Underground workers.
An extra 200 buses were being laid on, as well as additional river services, to help cope with demand.
Commuters were urged to cycle and walk where possible and avoid travelling during the morning and evening peak periods.
Tube services were halted last night in a dispute between four unions over the planned start of night services from September.
About 20,000 Tube workers are expected to walk out during the course of the strike, the BBC reported.
The strike on the Underground coincides with a separate, 48-hour walkout by First Great Western staff, causing disruption to rail services between London, the west of England and Wales.