The launch of the long awaited night tube could be hit by problems after union members voted overwhelming in favour of further strike action.

Sadiq Khan, the Mayor of London, announced the start date for the night tube on the Central and Victoria lines on Monday, with August 19 set to be the first weekend of 24-hour services.

From Monday: Night Tube start date announced: Here's everything you need to know about new London Underground services

Members of the Rail, Maritime and Transport Union, (RMT) have since announced their intentions to take strike action, over the night tube, pay and pensions. 

Your Local Guardian:

More than 85 per cent of members voted for strike action with an even larger majority for action short of a strike.

RMT general secretary, Mick Cash said: "RMT members have now shown their anger at the way that Tube Lines have attempted to tie in attacks on pensions with the offer on pay and Night Tube.

"There are also major unresolved issues over the Tube Lines staffing arrangements for the Night Tube and over Performance Related Pay.

"The ballot result will be considered by RMT’s executive and now that the members have shown their anger it is absolutely essential that there is the earliest possible resumption of serious and meaningful talks on these issues and the union is ready to engage in those talks."

The union claims there are ongoing disputes over staffing arrangements and performance related pay. 

The Night Tube was originally due to begin on September 12, 2015, but has been delayed following disputes over pay, staffing and working conditions with the RMT union and the Associated Society Engineers and Firemen (Aslef).