Trends
Boldyn Networks expands Transport for London 4G and 5G connectivity rollout across the capital
Boldyn Networks and TfL are expanding 4G and 5G mobile coverage across London Underground and Elizabeth line stations.

Headline
Boldyn Networks and TfL are expanding 4G and 5G mobile coverage across London Underground and Elizabeth line stations.
Context
• Boldyn Networks, under a 20-year concession with Transport for London (TfL), is deploying extensive 4G and 5G infrastructure across London’s transport network to deliver mobile coverage in stations, tunnels and urban areas. • The project leverages TfL’s ducts and street assets to accelerate small cell deployment, but infrastructure challenges, rollout pacing and operator uptake raise broader questions about actual user benefits. Boldyn Networks , a neutral host connectivity provider, has been progressing a major initiative with Transport for London (TfL) to bring consistent 4G and 5G mobile coverage across London’s transport network, including the London Underground and parts of the Elizabeth line.
Evidence
Pending intelligence enrichment.
Analysis
Under the concession agreed in June 2021, Boldyn is making use of existing TfL infrastructure — such as ducting, streetlamps and other assets — to install a high-capacity fibre backbone and radio equipment aimed at delivering mobile coverage in high-footfall locations as well as below ground. The company has reportedly installed over 200 small cells around the capital, including in areas such as King’s Cross, Waterloo, London Bridge, Old Street, The Shard and Hyde Park Corner, as part of efforts to densify 5G and 4G mobile signals at street level. Transport for London and Boldyn recently announced that high-speed mobile coverage is now active at 62 of the 121 underground Tube stations in ticket halls, platforms and corridors, with more stations — including King’s Cross St Pancras, Gloucester Road and Vauxhall — expected to go live in the coming months. Work in the tunnels is also ongoing, and TfL says it expects to bring the vast majority of the network’s below-ground areas online by the end of 2026. The rollout includes support for all four major UK mobile network operators — Three UK, EE, Vodafone and Virgin Media O2 — which connect their equipment to Boldyn’s infrastructure. A key objective of the initiative is to improve passenger experience by enabling data use, voice services and other connectivity-dependent tasks while travelling underground or waiting on platforms — activities that have historically been difficult in deep tunnel environments. Also Read: Altice explores sale of OXG Glasfaser stake despite Vodafone’s confidence in fibre network Also Read: Vodafone Idea launches 5G services in Bengaluru
Key Points
- What happened: connectivity project advances
- Why it’s important
Actions
Pending intelligence enrichment.





