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Talks are ongoing to reach a deal over pay and hours for Night Tube staffGetty

Transport for London (TfL) has warned that Londoners will face severe disruption on the Tube next week as planned industrial action looks set to go ahead. If talks to avert the walkout are unsuccessful, two 24-hour strikes will take place from 6.30pm on Tuesday 25 and Thursday 27 August.

Some services may be running because Aslef, the union which represents most drivers on the London Underground, has not currently joined RMT, TSSA and Unite in their protest over pay and conditions for the upcoming Night Tube service. The RMT and TSSA are expected to "review" their position on the planned strikes on 24 August.

A TfL spokesperson said: "Staff on the bus network, DLR, London Overground, TfL Rail, tram, Emirates Air Line and river services will not be on strike. These services will operate as normal but they will be much busier than usual, especially during peak hours, between Tuesday 25 and Friday 28 August.

"Roads and National Rail services and terminals will also be much busier. We will run whatever Tube services we can on those four days, based on the staff that sign into their shifts. All customers are advised to allow more time for their journeys."

Which services are running and when?

Staff on the bus network, DLR, London Overground, TfL Rail, tram, Emirates Air Line and River services will not be on strike. A number of Tube services will run between Tuesday and Friday, based on the staff on shifts, but TfL has advised customers to set aside more time for journeys. Entry and exit to the DLR at Bank will be through Monument station only.

On Tuesday 25 August, Tube services will start at the usual time in the morning but will stop running from around 6.30pm. Services are expected to be exceptionally busy between 4.30pm and 6.30pm. On Wednesday 26 August, most Tube services are unlikely to run at all and those that do will be less frequent than normal. Services that do run may only serve some stations, and may only run for part of the day.

On Thursday 27 August, Tube services will start at the normal time but there may be some delays from the strike action the previous day.Further strike action will begin in the afternoon. Tube services will stop running from around 6.30pm. On Friday 28 August, most Tube services are unlikely to run at all and those that do will be less frequent than normal.

How else can I get around?

Extra bus and river services will run and roadworks will be suspended wherever possible, with additional Santander Cycles hubs in place at key central London locations to make cycling an easier option. Day Travelcards bought in advance for travel on strike days can be returned before the day of travel for a full refund.

During the strike, TfL will run around 250 extra buses to help Londoners get around, but they are expected to be very busy and customers are asked to be patient with the transport staff who are at work. TfL will provide extra river ferry services on routes between central London and Canary Wharf, and central London and Putney.

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