The date for night tube services has been announced by Mayor of London Sadiq Khan — almost a year after they were due to start.
The Central and Victoria lines will be the first to start running all night on weekends, with the Northern, Piccadilly and Jubilee line to follow in the autumn.
Khan said: "I have made getting the night tube up and running a priority, and London Underground has now confirmed that services on the first two lines will launch on 19 August.
"The night tube is absolutely vital to my plans to support and grow London’s night time economy — creating more jobs and opportunities for all Londoners. The constant delays under the previous mayor let Londoners down badly."
Former mayor Boris Johnson announced intentions for the night tube in September 2014, and planned for it to start a year later. But disputes with unions over pay, staffing and working conditions delayed the start.
The RMT union greeted the announcement with scepticism, with general secretary Mick Cash saying there are "major unresolved issues".
"RMT also still has major concerns over the safe running of the night tube," he added.
Here's a map of train frequencies when it does start in August:
(Click on image for full size version)