Londoners can now stay connected on the move as high-speed mobile coverage expands across the London Underground network. Transport for London (TfL) has significantly progressed its rollout, bringing 4G and 5G to more stations and tunnelled sections.
Which Stations and Lines Are Now Connected?
The latest phase of the engineering programme has switched on faster coverage at key stations including Euston Square, Cannon Street, and Battersea Power Station. Commuters and travellers can now browse, stream, and communicate in these locations and in the connecting tunnels.
Further locations are scheduled to go live in the coming months. King’s Cross St Pancras, Gloucester Road, Warwick Avenue, and Vauxhall are all next in line for activation.
Major progress is expected on two lines in particular. The vast majority of both the Northern and Metropolitan lines should have coverage by the end of the summer of 2026, offering a connectivity boost to millions of journeys.
The Full Network Goal and Engineering Challenge
The ambitious project, delivered in partnership with infrastructure provider Boldyn Networks and major mobile networks Three UK, EE, Vodafone and Virgin Media O2, aims for near-total coverage. The target is to have high-speed mobile coverage across the entire Tube, DLR, and Elizabeth line network by the end of 2026.
There is also hope to extend the service to the Windrush line between Highbury & Islington and New Cross. This represents a complex engineering feat, with much of the work carried out overnight during limited engineering hours on one of the world's most intricate transport systems.
What TfL and Partners Say
Isabel Coman, Director of Engineering and Asset Strategy at TfL, stated: "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."
She added that engineers are working hard to deliver the programme and highlighted the customer benefits of being able to stay in contact, shop online, and keep up with news while travelling.
Nick Hudson, Chief Operating Officer for the UK and Ireland at Boldyn Networks, emphasised the scale of the collaboration: "A project of this scale demands extraordinary engineering effort and close-knit collaboration with TfL. We’re immensely proud of what’s been achieved so far, and each section completed brings us closer to our goal of creating a more connected London for those who visit the city and those who call it home."
The rollout updates a previous commitment made by London Mayor Sadiq Khan in 2021, who had initially aimed for full Underground coverage by 2024. The expanded timeline reflects the significant technical challenges involved in retrofitting the historic network.
