Most London Underground services remain suspended as a walkout by staff enters its fourth day.
Members of the Rail, Maritime and Transport union (RMT) are carrying out a “rolling strike” in a dispute over pay and its unmet demand for a 32-hour working week.
On Tuesday, some Northern line services operated but the rest of the Tube network was closed. The Docklands Light Railway (DLR) was suspended as part of a separate dispute.
Transport for London (TfL), which offered staff a 3.4% pay rise, said the demands for a shorter working week are unaffordable.