The number of Night Tube services during the period after midnight could be increased, the mayor of London has said.
Sadiq Khan said Transport for London (TfL) was looking at whether a more frequent service could be provided during the busiest part of the night.
The Night Tube currently operates on five of the Underground’s 11 lines – the Victoria, Jubilee, Central, Piccadilly and Northern.
The London Overground also operates night services on the former “East London line” between Highbury and Islington and New Cross Gate.
The service runs on Friday and Saturday nights only, with fewer trains than during the day.
On most of the current Night Tube network, services are every 10 minutes, although they can be as often as every seven or eight minutes on the Northern line, or as few as every 20 minutes on the outer edges of the Central line.
There are, though, no immediate plans to expand the network to cover more Underground lines, City Hall said.