Tube 4G and 5G expansion unlocks powerful new advertising formats

The London Underground is fast becoming one of the most connected public transport systems in the world. With the rollout of 4G and 5G mobile coverage now stretching through more than 30 underground stations and connecting tunnels, brands have a bold new platform to play with. For advertisers looking to push creative and interactive campaigns, the Tube’s enhanced mobile connectivity unlocks a world of digital potential.

Full-speed data, underground

As of mid-2025, more than 30 stations and their connecting tunnels are fully equipped with high-speed 4G and 5G mobile coverage, with many more on the way. By the end of 2025, the majority of stations and tunnel sections across the Tube network are expected to be connected. Areas now live include key Zone 1 stations like Oxford Circus, Tottenham Court Road, Camden Town, and Euston, as well as major interchanges like Bank, London Bridge and Canary Wharf.

This builds on the existing Wi-Fi availability in ticket halls and platforms, but the game-changer lies in seamless connectivity through tunnels. No longer are commuters left in digital limbo between stops. This reliable coverage means uninterrupted access to mobile networks, creating an always-on environment for digital advertisers.

What this means for advertisers

The implications for brand campaigns on the Underground are substantial. Traditional formats such as digital 6-sheets, escalator panels, and digital gateways now support real-time interaction. That means:

• Clickable CTAs: Commuters can immediately scan a QR code or tap an NFC-enabled panel and follow through, enabling easy sign-up, download, purchase or video play without the barrier of no service.
• AR activations: Augmented reality ads are no longer limited by patchy signal. A poster can now become an interactive 3D experience on the spot.
• Live data campaigns: Content can be adapted in real-time allowing live sports scores, stock prices, weather or geo-targeted messaging that changes depending on location or time of day.
• Social amplification: Riders can post, share, and tag campaign content while underground, increasing organic reach and engagement.

The Underground becomes your digital showroom

The London Underground is one of the most captive environments in media. With average dwell times of over 3 minutes on platforms and around 13 minutes in carriages, it’s long been a favourite for high-impact OOH campaigns. Now, that physical presence can be paired with instant mobile interaction.

A digital ribbon or screen takeover in a station like Oxford Circus or Bank can now lead directly to product trials, downloads, or social interactions—allowing advertisers to close the loop between brand awareness and action.

Ideal formats for high-connectivity campaigns

Some of the best-suited formats to leverage the 4G/5G expansion include:

• Digital Escalator Panels: Strategically placed for high dwell and interaction.
• Digital 12-sheets: Located in ticket halls and corridors where connectivity is now seamless.
• In-carriage panels: With mobile access during tunnel journeys, these can direct commuters straight to app downloads or sites.
• Station takeovers: Allowing brands to fully immerse a station environment while supporting multi-touch digital actions.

What’s next?

TfL has partnered with Boldyn Networks to deliver this network-wide transformation. The plan is for 5G access to be available across 90% of the network by the end of 2025, with all ticket halls, platforms, tunnels and corridors fully covered shortly after.

For advertisers, this presents a perfect blend of physical presence, digital reach and interactive innovation. Now is the time to be planning campaigns that tap into this connected audience. The future of Underground advertising is fully interactive.

FAQs

How many London Underground stations now have 4G or 5G coverage?

Over 30 stations and their connecting tunnels currently have high-speed mobile coverage, with more being added every month. Check out the current coverage map

Can digital adverts on the Tube now include call-to-action features?

Yes. With 4G/5G coverage, commuters can scan QR codes or interact with ads in real time, even in tunnels.

Are AR and immersive formats now possible on the Tube?

Absolutely. Reliable mobile coverage supports AR activations, app downloads and other data-driven interactive formats.

Which advertising formats benefit most from mobile connectivity?

Digital 6-sheets, escalator panels, in-carriage digital panels and station takeovers are particularly effective.