Londoners will be hit will a second Tube strike on August 5, as unions and Transport for London bosses have failed to come to an agreement over the Night Tube proposals.
Rail union Aslef has announced that drivers, along with other Underground staff, plan to walk out from 9.30pm for 24 hours.
If it goes ahead the strike will come almost four weeks after the first round of strikes brought parts of London to a standstill - and saw Canary Wharf nearly deserted as people opted to work from home.
Union bosses have strenuously denied the row is only over pay and say workers also have issue with the working hours proposed and also the safety of staff and customers.
The RMT, TSSA and Unite have yet to announce whether they will take part.