Commuters travelling into London could face journey disruption when a 48-hour strike by underground staff starts at 9pm on Monday.
Transport for London (TfL) plans to run a limited service during the strike with services not returning to normal until the same time on Wednesday evening.
The Bakerloo, Circle, District and Hammersmith & City lines, which operate from London Paddington, will be affected with fewer trains running and trains not calling at a number of stations.
The Bakerloo line will be the most affected, with trains not stopping at main stations such as Edgware Road, Embankment, Maida Vale and Piccadilly Circus.
The Circle, District & Hammersmith & City lines will run relatively as normal, though travellers are warned that there could be last-minute closures and should check for updates before setting off.
Services on the London Overground, DLR, trams and National Rail will be operating as normal.
A second 72-hour strike is also scheduled from 9.00pm Monday, May 5.
The strike by members of the Rail, Maritime and Transport Union comes in response to the Government’s plans to revolutionise the London Underground's ticketing service, which will incorporate the shutting down of ticket offices and the loss of 950 jobs.
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