The mayor of London has suggested that there might be more Night Tube services available after midnight.

According to Sadiq Khan, Transport for London (TfL) is investigating the possibility of offering a more frequent service during peak hours of the night.

Currently, five of the eleven Underground lines—the Victoria, Jubilee, Central, Piccadilly, and Northern—are home to the Night Tube.

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.