Mobile phone coverage has been expanded to more areas of the London Underground network, with further stations and tunnels to go live in the coming months, Transport for London (TfL) has announced.

Further stretches of the Piccadilly, Northern and Victoria lines will now have 4G and 5G coverage as TfL and Boldyn Networks, TfL’s partner in delivering the connectivity, work on expanding mobile coverage across the entire Tube network. 

Coverage has been expanded along the Northern line, including the tunnelled section between Balham and South Wimbledon, as well as Kennington, Oval, Tooting Broadway and South Wimbledon stations.

Passengers in south London travelling along the Northern line from South Wimbledon to Stockwell also now have continuous coverage.

The Bank branch of the Northern line between Euston and Bank is receiving coverage for the first time, with more mobile networks going live along this section in the coming weeks.

This follows coverage on the Piccadilly line and Victoria line being extended up to King’s Cross St Pancras earlier this year, and the Elizabeth line achieving full 4G mobile coverage last year. 

Uninterrupted mobile coverage was first introduced on the eastern half of the Jubilee line in 2021. At the time, TfL said that coverage would be expanded in phases to ticket halls, platforms and tunnels on the Tube network, with full coverage aimed for the end of 2024.  

In April 2022, the roll-out was continuing, and while more sections of the underground have been getting 4G and 5G coverage, the project is still not complete. 

In July 2024, TfL said that around 80% of all London Underground stations, ticket halls and tunnels should be connected by the end of 2024, or around 220 of 272 stations. 

The latest from TfL is that work to deliver mobile coverage across the whole Tube network will continue throughout 2025 and 2026.

All four mobile network operators – Three UK, EE, Vodafone and Virgin Media O2 – are supported, and the roll-out is set to continue across the network in the coming months. 

This will include along the Jubilee line, starting at Swiss Cottage and working its way along the line to link with existing coverage at Westminster. 

Major interchange stations, such as Green Park and King’s Cross St Pancras, as well as further sections of the Victoria line from Green Park to Brixton, will get high-speed mobile coverage for the first time.

Rebecca Bissell, director of technology product and operations at TfL, said: “Further tunnelled sections will be going live in the coming months and we are working hard to bring the benefits of being able to stay in contact while travelling through our city as quickly as possible to the rest of the network.”

TfL and Boldyn aim to introduce high-speed 4G and 5G mobile coverage across the whole Tube, Docklands Light Railway (DLR) and Elizabeth line network, including on the Windrush line between Highbury & Islington and New Cross.