London commuters were today facing the possibility of more tube strikes as union leaders and managers continued to wrangle over pay and rosters.
Negotiations at the conciliation service ACAS were adjourned yesterday to allow the two sides to consider their positions.
Officials from the two most powerful unions, RMT and Aslef, are expected to meet in the next 48 hours to discuss further walkouts.
The long-running dispute appeared deadlocked after the two sides failed to reach a deal on a pay rise and the launch next month of the 'Night Tube'.
The RMT said the offer of a 1% pay rise was unacceptable. The union is demanding an above inflation increase.
Union officials are also angry at London Underground's decision to publish draft rosters for the Night Tube, due to launch on September 12th.