Thurrock commuters are facing another day of severe disruption on the London Underground network as a third 24-hour strike over job cuts takes place.
Thousands of union members were expected to take part in the walk out which started on Tuesday night.
Services are not running on the Circle Line and there are suspensions on the Bakerloo, Central, District, Northern and Victoria lines.
Unions are protesting at plans to cut 800 mainly ticket office jobs.
About 11,000 members of the Transport Salaried Staffs’ Association and Rail Maritime and Transport union were due to walk out over the cuts.
Maintenance workers walked out from 1900 GMT on Tuesday and operational staff followed at 2100 GMT.
Transport for London said cuts would not result in compulsory redundancies.
It also said the planned cuts, mainly from ticket offices, would have no impact on safety.
A Transport for London (TfL) spokesperson said: “The changes we’re proposing to ticket office opening hours are in line with customer demand, so that our employees are deployed in those places and at those times where passengers most value their help and reassurance.”
TfL said it anticipated services would run on all lines on Wednesday, except the Circle and Piccadilly lines.
On the Central Line, trains between White City and Leytonstone were only expected to run from 1000 GMT until 2000 GMT.
TfL issued a list of 80 stations out of the 270 on the network which would remain closed on Wednesday.
Despite the strike, the conciliation service Acas announced on Tuesday that fresh talks would be held on Thursday in a bid to resolve the dispute.
A fourth strike is planned for 29 November.