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Transport for London have warned some tube services will finish earlier than usual tonight as London deals with the third tube strike in 2 months.
The walkout officially begins at 7pm, but Transport for London's advice is to finish your journey as soon as you can.
The real impact is expected to be felt tomorrow, when 80 stations will be closed, including Charing Cross, Piccadilly Circus and Knightsbridge in central London as well Heathrow Terminal 4 in west London.
TFL say services will not return to normal until Thursday morning.