London could be set for another Tube strike with members of the Aslef the train drivers’ union planning a 24-hour walk out on 5 August.
The second strike over the night Tube plans is set to start at 21:30 on 5 August, and comes shortly after the entire Underground network was shut down last week.
Conciliation service Acas has invited both sides to hold talks on Tuesday in an attempt to avert the industrial action.
An Acas spokesman said: 'Acas has written to London Underground, ASLEF, RMT, TSSA and Unite inviting them to attend exploratory talks tomorrow morning. We are waiting to hear from them all.'
The Rail, Maritime and Transport (RMT) union, the Transport Salaried Staffs Association (TSSA) and Unite union have not yet announced their position, although four trade unions were involved in the last strike.
Labour’s London Assembly Transport Spokesperson Val Shawcross AM said: 'With another strike on the horizon it’s time for Boris Johnson to tone down the rhetoric and start focusing on resolving this dispute before Londoners are forced to endure another day of travel chaos.
'The fact is that everyone wants the night tube to work, it’s just got to be done right. Londoners elected Boris to lead the capital, that means talking to the unions and finding a resolution, not sitting on the side-lines throwing insults around.'
