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London Underground has launched the first official map showing which Tube lines will run all night when 24-hour operation begins in less than three months' time.

The new map shows passengers which Tube lines will operate overnight services over the weekend after September 12 and which stations will be open 24-hour.

They map was announced as London Underground faces a strike next month by Tube drivers over pay and conditions for the all night Tube .

Members of Aslef will walk out for 24 hours from 9.30pm on July 8.

The RMT and TSSA unions are balloting their members for industrial action, with the results due at the end of the month.

Gareth Powell, London Underground's director of strategy and service development, said: "The introduction of the Night Tube is a historic step in our modernisation of the Underground.

"The Night Tube map shows our customers exactly when and where they can use this landmark service, which will make their late night journeys quicker and easier than ever before."

As well making life easier for people, the Night Tube will also boost London's night-time economy - supporting thousands of jobs and stimulating hundreds of millions of pounds in economic growth."

Mick Cash, general secretary of the RMT said: "Instead of hyping up route maps and publicity stunts, Transport for London should be addressing the staffing, pay and safety issues at the heart of the current dispute over night running on London Underground. That should be their priority."

Night Tubes will run on Friday nights and the early hours of Saturday and Sunday mornings