London Underground is to delay the launch date of its new 24-hour weekend service to allow more time for talks with the unions.
The all-night tube was due to start on the Jubilee, Victoria and most of the Piccadilly, Central and Northern lines on September 12.
But workers and unions have been in dispute with management over pay and working hours and there has already been a series of strikes.
More strikes were threatened for this week but were called off pending further discussions.
London Underground has now postponed the launch until later in the autumn.
Managing director Nick Brown said: "Further to the progress made in recent days with the trade unions and the suspension of strike action, we believe we are not far from an agreement that protects the work-life balance of our employees and is affordable, sustainable and fair.
"As such, we have decided to defer the introduction of Night Tube to allow more time for those talks to conclude. Our objective is to reach an agreement that ends this dispute and delivers the Night Tube for Londoners this autumn."
