Update Friday 21 July: Members of the RMT, Aslef and Unite unions who were due to strike between 23 and 28 July have called off their strike action, due to progress in negotiations with TfL.
Tube services face major disruption during the tail end of July, as members of the RMT, ASLEF and Unite unions take part in a 'week of action', starting Sunday 23 July.
Workers in various roles and areas will take action at different times between Sunday 23 and Friday 28 July. It's in protest against job cuts and changes to pensions and working conditions.
The effects of the strike action is as follows:
Sunday 23-Monday 24 July: London Underground services close early on Sunday 23 July, with TfL's advice being to complete your journeys by 7pm. On Monday 24 July, a good service is expected by late morning.
Tuesday 25 and Thursday 27 July: Little or no service across the London Underground.
Wednesday 26 and Friday 28 July: No service expected across London Underground including night tube.
Saturday 29 July: Tube services start later than normal with a good service expected by midday
Additional to the tube strikes, National rail strikes are taking place on 20, 22 and 29 July, which may also affect some District line, London Overground, Elizabeth line and tram services.
RMT general secretary Mick Lynch said: "This week of action will shut down the London Underground and show just how important the work of our members is."
Glynn Barton, TfL's Chief Operating Officer, said: "We are continuing to talk with trade unions to discuss the issues and seek a resolution."
More information on the strikes and how to navigate them can be found on TfL's website.