Tube strike 2017: When is it, how long will the walkout last and everything else you need to know

Up to 4,000 ticket and station staff are expected to walk out in a dispute of job losses and ticket office closures

Commuters will face major travel issues as strike action is set to close many of central London’s tube stations on Sunday and Monday.

Up to 4,000 ticket and station staff are expected to walk out in a dispute of job losses and ticket office closures.

Transport for London (TfL) has warned some lines will have no service whatsoever and others will face significant disruption.

Here is everything you need to know:

When do they start and how long will they last?

Members of the Transport Salaried Staffs Association (TSSA) and the Rail, Maritime and Transport (RMT) union are due to strike from 6pm on Sunday.

The service will therefore be disrupted until the morning of Tuesday 10 January.

Why are the strikes taking place?

The walkout is in protest at 800 job cuts and the closure of ticket offices under former mayor Boris Johnson.

The unions are angry that current Mayor, Sadiq Khan, has not reopened any ticket offices.

Which lines are affected?

There will be no service on the Victoria and Waterloo & City lines. Piccadilly line services will still run between Hammersmith and Heathrow Terminals 1, 2 and 3, but will not go to Terminals 4 or 5.

Most Zone 1 stations will be shut and there will be no connections at major stations including Victoria, King’s Cross, Waterloo, Paddington, Euston, Bank and London Bridge.

Will there be alternative transport available?

Buses, DLR, London Overground and National Rail routes will be running but are expected to be much busier than usual.

TfL are set to deploy an extra 100 buses to deal with the extra demand.

How can I plan my journey? Are there any useful apps to get around?

You can use the TfL website to plan your journey or use City Mapper. Failing public transport you can hop on a "Boris bike" or use an Uber to get around the capital.

How many more strikes will there be in 2017?

This depends on the outcome of negotiations between London Underground and union bosses.

The unions are looking for a “radically improved package” covering jobs and safety and have said no progress has been made as of yet.