The London Underground's Night Tube service will launch its third line tonight (7 October) with the Northern Line set to run 24-hours from 18 November. The Mayor of London Sadiq Khan announced the Northern line service will run from High Barnet and Edgware, via the Charing Cross branch, to help people travel to and form work as well as help visit the capital's "iconic nightlife venues".

The announcement arrives as the Jubilee line joins the Central and Victoria line in becoming a 24-hour service, with more than 750,000 journeys already made on the Night Tube services.

Transport for London (TfL) is also introducing two new bus routes to complement the Jubilee line Night Tube service.

Route 114 will travel between Mill Hill and Ruislip Station, via Queensbury, Harrow and South Harrow. The 183 will operate between Golders Green and Pinner, calling at Kingsbury and Harrow. Both will run every half hour through the night on Friday and Saturdays.

Khan said: "There was a real buzz from when we launched the first Night Tube services in August, and I am delighted that the Jubilee line services are now up and running.

"Hundreds of thousands of Londoners have already benefited, and it's great news that so many more will now be able to enjoy our world-class cultural venues on the South Bank, as well as venues such as The O2 and Wembley Stadium, without needing to make that late dash for the last Tube.

"Being from Tooting, I'm also really looking forward to the start of services on the Northern line next month."

Mark Wild, London Underground's Managing Director, said: "We're delighted that we are now able to bring the Night Tube to our Jubilee line customers, following the successful launch of the Central and Victoria line services this summer.

"Nearly three-quarters of a million journeys have already been made on the Night Tube, surpassing our projections, and numbers continue to rise. Introducing the Night Tube on the Northern line next month will be another step forward for London, opening up new opportunities for Tube customers to enjoy even more of what London has to offer."

night tube London Underground
Passengers travelling on the London Underground's Night Tube service Jack Taylor/Getty Images