There will be no service on the entire London Overground network on Wednesday October 5, Transport for London (TfL) has said.
On Saturday, October 8, the RMT union, which represents rail workers including guards and signalling staff will also stage a national strike.
Some of London Underground, London Overground and the Elizabeth line will be affected by this action, said TfL.
Bus services will run as normal but may be busier as a result of the rail strike action.
The unions are in dispute with the government and rail companies about pay, job cuts and changes to terms and conditions.
RMT leader Mick Lynch said that talks with the new transport secretary Anne-Marie Trevelyan were a "good start", but that "concrete change" was needed.
Mick Whelan, Aslef general secretary said that they “ don’t want to go on strike” but the train companies have “not offered us a penny.”
TfL has asked customers to “check before they travel” in London on Wednesday and Saturday.
Travel advice for each day is set out below.
Wednesday, October 5
- Strike action is being taken by train drivers on London Overground who are part of the ASLEF union meaning that there will be no service on the entire London Overground network.
- 14 other operators, including Heathrow Express, Southeastern and Greater Anglia, will be impacted. Check National Rail Enquiries for the latest information.
Thursday, October 6
- London Overground will resume a good service by late morning.
Friday, October 7
- Night Overground will run until around 4am on Saturday October 8, which is an earlier finish than normal.
Saturday, October 8
- RMT strike action on national rail services will impact services on London Overground with no services between 4am and 8am and after 6pm.
- A reduced service will operate between 8am and 6pm. A Saturday Night Overground service will not operate.
- Parts of the District and Bakerloo lines will also be disrupted. Services will be disrupted on the District line between Richmond and Turnham Green, with limited services between 7.15am and 6.30pm only.
- Services will be disrupted on the Bakerloo line between Queen’s Park and Harrow & Wealdstone, with limited services between 8am and 6pm only.
- There is a planned District line closure due to engineering work on October 8 between Earl’s Court and Wimbledon.
- The central section of the Elizabeth line from Paddington to Abbey Wood will have a normal service of twelve trains per hour until 5,45pm when services will be reduced to six trains per hour.
- On the east between Liverpool Street and Shenfield, trains will run a reduced service of two trains per hour from around 7.30am until 5.30pm when services will end and on the west from Paddington to Reading or Heathrow will run a reduced service of two trains per hour from around 7.40am until 5.10pm when services will end.
Sunday, October 9
- Services will start slightly later on the London Overground, Bakerloo and District lines with a good service expected by late morning
- There is a planned District line closure due to engineering work on October 9 between Earl’s Court and Wimbledon, and between Turnham Green and Richmond
- Elizabeth line services will start at around 6.30am on the east, 8am in the west and the Elizabeth line from Paddington to Abbey Wood does not currently run on Sundays.