Transport for London (TfL) and Boldyn Networks have announced that the rollout now includes parts of the Circle and District lines, with stations such as Euston Square, Cannon Street and Battersea Power Station among those recently connected.
Of the 121 Tube stations that are located ‘underground’, 62 now have 4G and 5G coverage in ticket halls, corridors and platforms.
Isabel Coman, director of engineering and asset strategy at TfL, said: “It’s great to see further progress in our goal to introduce high-speed mobile coverage across our Tube network.
“The latest stations and tunnels going live means that we are on a clear path towards having 4G and 5G mobile coverage across the whole network by the end of 2026.”
Sections of tunnel between Blackfriars and Cannon Street, and between Notting Hill Gate and Bayswater, also now have live mobile connectivity.
Coverage is expected to reach the vast majority of the Northern and Metropolitan line tunnels by the end of summer 2026.
All four major UK mobile operators, Three UK, EE, Vodafone and Virgin Media O2, are participating in the rollout.
The system will eventually support the new Emergency Services Network, providing vital data access for first responders during emergencies.
TfL and Boldyn are also preparing to introduce coverage to the Docklands Light Railway (DLR) and Windrush line, with design and initial testing work now underway.
Work is being coordinated with other projects, such as installation work taking place alongside the planned escalator works at Cutty Sark.
Installation will continue through 2026 focusing on sections of the Circle and District line, as well as along the Victoria, Jubilee, Bakerloo, and Piccadilly lines and along sections outside of central London and where smaller tunnelled sections need to be treated individually.
City of London corporation policy chairman Chris Hayward said: “The City of London is one of the most important financial centres in the world, the economic heart of the United Kingdom, and London’s central business district, so we welcome Transport for London’s continued expansion of high-speed mobile coverage across the Square Mile.
“With around 8,700 residents, 21 million visitors annually, and home to more than 678,000 workers, it is more important than ever that we have reliable connectivity.”
Boldyn Networks, which holds a 20-year concession from TfL, is also working to install a fibre backbone to improve connectivity citywide.
