On 16 March, 18 March, 30 March and 1 April members of the Rail Maritime and Transport (RMT) Union working for 14 train companies will strike.

These walkouts will each last 24 hours, causing severe disruption to travel on the strike days and affecting journeys on the days either side.

RMT members working for National Rail will also take strike action on 16 March, running until 2am on 17 March.

On 15 March, the tube will grind to a halt as London Underground drivers, represented by Aslef, and other tube workers, represented by the RMT, walk out.

The fresh strike dates are the latest in a long-running dispute over pay, jobs and conditions that has disrupted passenger journeys since June.

In mid-February, RMT rejected the terms offered by Network Rail and 14 train operators on the grounds they "did not meet the needs of members on pay, job security or working conditions".

Here are the lines and times affected. Information will be updated as rail operators publish details:

London Underground - "little or no service is expected on the tube network" on 15 March while on 16 March services will start later than normal

London Overground - services should run as normal on 15 and 16 March but some stations may be closed and services are expected to be busier on Wednesday

Elizabeth Line - trains will be running on 15 March but will be "much busier" than normal with queuing systems possible. On 16 March some services will start later and finish earlier

DLR - services are expected to run as normal on 15 and 16 March

East Midlands Railway - the company says it is "reviewing" how the strikes will affect services, with information on timetables and ticketing available on its website soon

Great Western Railway - advises a revised timetable will be in place and some parts of the network will have no trains running

Avanti West Coast - timetable and service will be "reduced significantly", with customers told any trains that do run will be very busy

LNER - the company says it is "currently reviewing how these proposed strikes will impact our trains"

CrossCountry - the company is "currently assessing" how trains will be impacted but says a "limited service" will be in place

TransPennine Express - "no or very limited services on strike days" with customers advised to travel only if their journey is "absolutely essential". A reduced timetable the day after strikes means people should avoid travel on these days "where possible"

Greater Anglia - firm repeats its earlier advice to "avoid travelling" and that services will be "severely reduced and disrupted", with trains starting later and finishing earlier than normal

c2c - "on the c2c route, we will operate a severely reduced service with trains running between 07.30-18.30 only"

Chiltern Railways - strikes "will affect services on and around the strike days" with a different timetable on strike days

Southern Rail - the railway will have limited opening hours with customers advised to avoid travel

Great Northern - advice is the same as Southern Rail

Thameslink - firm repeats advice to avoid travel on strike days and expect disruption on the day after

Gatwick Express - "severe disruption" expected on RMT strike days.

West Midlands Railway - expects to run a "very limited service" with no trains on some parts of the network

Southeastern - there will be no Southeastern, Southern or Thameslink train services from the company's station on strike days

Northern - strike action will "significantly impact our ability to run a train service", the company says

South Western Railway - the company is "still determining" how the industrial action will impact services, with customers advised to check back on the website.