{"id":46882,"date":"2026-06-15T14:43:24","date_gmt":"2026-06-15T13:43:24","guid":{"rendered":"https:\/\/www.ispreview.co.uk\/?p=46882"},"modified":"2026-06-16T16:42:44","modified_gmt":"2026-06-16T15:42:44","slug":"o2-uk-and-cellnex-deal-to-tackle-5g-mobile-not-spots-on-brighton-main-line","status":"publish","type":"post","link":"https:\/\/www.ispreview.co.uk\/index.php\/2026\/06\/o2-uk-and-cellnex-deal-to-tackle-5g-mobile-not-spots-on-brighton-main-line.html","title":{"rendered":"O2 UK and Cellnex Deal to Tackle 5G Mobile Not-Spots on Brighton Main Line UPDATE"},"content":{"rendered":"

Mobile operator O2<\/a> (Virgin Media<\/a>) and wireless infrastructure firm Cellnex UK<\/a> have today signed a 5-year agreement to join the Brighton Main Line (BML) connectivity project, which aims to expand “highspeed<\/em>” 5G<\/a> mobile (mobile broadband) connectivity and tackle mobile signal “not-spots<\/em>” across the route.<\/p>\n

The BML is a 108km long railway corridor in southern England that links London (Victoria and London Bridge) to Brighton on the south coast and handles 300,000 daily passengers (1,700 daily train movements). The route includes major commuter stations like London Bridge, London Victoria and Clapham Junction, as well as connecting into Gatwick Airport. The train operators on this line include Thameslink, Southern, Gatwick Express, Great Western Railway and London Overground Services.<\/p>\n

NOTE:<\/strong> The Government\u2019s 10 Year Industrial Strategy<\/strong><\/a> last year pledged \u00a341m to help introduce Low Earth Orbit (LEO) broadband satellite<\/a> connectivity \u201con all mainline trains<\/em>\u201d in order to tackle the issue of poor onboard connectivity. Meanwhile, Project Reach<\/strong><\/a> is separately working to deploy \u201cultra fast fibre optic cable<\/em>\u201d across 1,000km of major rail lines to help \u201celiminate mobile signal blackspots<\/em>\u201d in tunnels on \u201ckey rail routes<\/em>\u201d.<\/div>\n

Under the plan, O2<\/a> will gain access to Cellnex UK’s new purpose-built neutral host infrastructure, enabling the phased rollout of high-speed mobile connectivity, including 5G<\/a>, to customers across the entire route over the “coming months<\/em>“. The move follows Cellnex signing Three UK<\/a> in 2023.<\/p>\n

New indoor coverage solutions are now being deployed to enhance mobile phone connections in three of the most important London stations, London Victoria, London Bridge, and Clapham Junction, which account for roughly 19% of railway passenger traffic to and from the capital from outside London.<\/p>\n

Steve Cray, Managing Director of Cellnex UK, said:<\/strong><\/p>\n

\u201cRegular railway passengers will understand the frustration of losing signal mid-conversation or spending whole journeys with buffering videos. With O2<\/a> now on board, many more passengers are going to notice the difference on one of the UK’s most important commuter routes. This collaboration stands as one of the most significant end-to-end telecommunications infrastructure deployments in British railway so far, and we are proud to be setting a new standard for the UK’s entire rail network.\u201d<\/p><\/blockquote>\n

Professor Robert Joyce, Director of Mobile Access Engineering at O2, said:<\/strong><\/p>\n

\u201cOur \u00a3700m Mobile Transformation Plan is focused on delivering reliable connectivity in the moments that matter most, and railway lines are a key part of that. By working with Cellnex to improve connectivity along the Brighton Main Line, we\u2019ll be bringing improved coverage and capacity to customers travelling from the coast to the capital over the coming months.\u201d<\/p><\/blockquote>\n

Cellnex designed, planned, and built this infrastructure in partnership with Network Rail<\/strong> under a 25-year contract awarded in 2021, enabling all UK mobile network operators (MNOs) to access shared connectivity – related coverage improvements being brought live in stages across the route.<\/p>\n

Once fully activated, the shared infrastructure is expected to deliver “high speed connectivity<\/em>” across 99% of the 108 km route, “drastically reducing historical not-spots and ensuring passengers enjoy reliable calls, uninterrupted streaming and stable app performance<\/em>” throughout their journey. The goal is to bring “seamless connectivity<\/em>” to a route long challenged by deep cuttings, long tunnels and Victorian-era station infrastructure.<\/p>\n

UPDATE 16th June 2026 @ 4:41pm<\/strong><\/p>\n

Just to clarify the status of the new network. Cellnex is close to completing deployment along the Brighton Mainline. Elements of the solution are now undergoing technical testing, with a view to being activated in the coming months. As matters stand, only O2’s services will start to go live as elements of the BML solution come online.<\/p>\n","protected":false},"excerpt":{"rendered":"

Mobile operator O2 (Virgin Media) and wireless infrastructure firm Cellnex UK have today signed a 5-year agreement to join the Brighton Main Line (BML) connectivity project, which aims to expand “highspeed” 5G mobile (mobile broadband) connectivity and tackle mobile signal “not-spots” across the route.<\/p>\n","protected":false},"author":1,"featured_media":46884,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[61,406,60,32,78],"class_list":["post-46882","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uk_isp_news","tag-4g","tag-5g","tag-mobile-broadband","tag-o2","tag-trains"],"share_on_mastodon":{"url":"https:\/\/mastodon.social\/@ispreview\/116754422597482840","error":""},"yoast_head":"\nO2 UK and Cellnex Deal to Tackle 5G Mobile Not-Spots on Brighton Main Line UPDATE - ISPreview UK<\/title>\n<meta name=\"description\" content=\"Mobile operator O2 (Virgin Media) and wireless infrastructure firm Cellnex UK have today signed a 5-year agreement to join the Brighton Main Line (BML)\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ispreview.co.uk\/index.php\/2026\/06\/o2-uk-and-cellnex-deal-to-tackle-5g-mobile-not-spots-on-brighton-main-line.html\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"O2 UK and Cellnex Deal to Tackle 5G Mobile Not-Spots on Brighton Main Line UPDATE - 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