The much-delayed night tube will finally start running in late July, Mayor of London Boris Johnson says.
Services will run through the night on Fridays and Saturdays on the Central, Piccadilly, Northern, Victoria and Jubilee lines.
A Transport for London (TfL) spokesman was a little more cautious over that deadline than the mayor, probably mindful of the fact the service was due to start in September, but delayed by disputes over pay and conditions with the unions.
The TfL spokesman said: "We are not in a position to fix an exact date but we are working to a time in late July at the earliest, to start the night tube service."
Progress on the night tube came after a breakthrough in talks with key unions — Aslef and the RMT. The TSSA and Unite are yet to accept the pay deals. The RMT is still in dispute over safety concerns.