Night tube is a win-win for London, says mayor Sadiq Kahn – video

The mayor of London announces the opening of 24-hour tube service on London Underground on the Central and Victoria lines on Friday. Sadiq Kahn says the night tube service on Fridays and Saturdays will help people get to and from work more easily, while also allowing safe travel home after an evening out in the city. Photograph: Dominic Lipinski/PA