London’s long-awaited all-night Tube service will launch on two underground lines on 19 August, the new mayor has announced.
A 24-hour service had been due to start last year but no agreement was reached with the unions, which led to it being delayed.
Transport for London (TfL) has now said all-night operations will begin at weekends on the Central and Victoria lines.
The night service will be rolled out on the Jubilee, Northern and Piccadilly lines later in the autumn, when the new Tube drivers have completed their training.
Around 200 part-time drivers are taking part in a 14-week training programme to implement the new service.
Earlier this year, unions agreed a pay deal, bringing to an end the strikes which had forced the programme to grind to a halt.