{"id":45017,"date":"2026-03-12T10:50:00","date_gmt":"2026-03-12T10:50:00","guid":{"rendered":"https:\/\/www.ispreview.co.uk\/?p=45017"},"modified":"2026-03-12T12:12:56","modified_gmt":"2026-03-12T12:12:56","slug":"openreach-trial-uses-uk-broadband-network-to-detect-100-water-leaks","status":"publish","type":"post","link":"https:\/\/www.ispreview.co.uk\/index.php\/2026\/03\/openreach-trial-uses-uk-broadband-network-to-detect-100-water-leaks.html","title":{"rendered":"Openreach Trial Uses UK Broadband Network to Detect 100+ Water Leaks"},"content":{"rendered":"

Network access provider Openreach<\/a> (BT<\/a>) has today revealed some of the first results from their ongoing trial of a new technology (here<\/a>), which harnesses the operator\u2019s existing fibre optic broadband network to detect mains water leaks. In just three months, it’s already pinpointed 100+ leaks and is estimated to be saving 2 million litres of water a day.<\/p>\n

The idea of using optical fibre cables, which transmit data using pulses of laser light, to detect and monitor nearby events is nothing new. For example, scientists have already found ways of turning such cables into Earthquake and Tsunami monitors (here<\/a> and here<\/a>), which works by detecting changes in the polarization of light as it moves through the cable. We\u2019ve also seen fibre sensing technologies being adapted to detect sabotage against vital subsea cables (here<\/a>).<\/p>\n

NOTE:<\/strong> England and Wales lose around 3 billion litres of treated water daily through leaks. Openreach<\/a>\u2019s full fibre (FTTP<\/a>) broadband network covers c.22 million UK premises and they\u2019re aiming to reach 25m by December 2026, before targeting “up to<\/em>” 30m by 2030.<\/div>\n

Suffice to say that fibre optic sensing technologies have come a long way and they\u2019re continuing to improve, which is likely to offer some new and increasingly interesting opportunities for existing broadband operators. Naturally, any operator with a network the size of Openreach<\/a>\u2019s is a prime candidate for such things, particularly if it can be successfully adapted to help identify and locate water and gas leaks.<\/p>\n

In this case the 6-month trial we’re talking about reflects a partnership between Openreach, Affinity Water and UK technology company Lightsonic<\/a>, which have adopted Distributed Acoustic Sensing<\/strong> (DAS). The technology converts fibre optic cables into early warning sensors that can \u201chear and accurately pin-point problems<\/em>\u201d across surrounding water networks \/ pipes (gas could also be covered).<\/p>\n

\"Fibre-sense-Lightsonic-leak-detection-mobile-app\"<\/p>\n

Developed by Lightsonic – the fibre-optic leak detection platform is currently being piloted in five locations \u2013 Walton-on-Thames, Hemel Hempstead, Luton, Chesham\/Amersham and Ware. By harnessing Openreach’s network, this is currently able to monitor 650 kilometres of Affinity Water\u2019s network.<\/p>\n

How does DAS technology work?<\/strong><\/span><\/p>\n

DAS technology works by detecting changes in the light signal used in fibre optic cables caused by vibrations from a leak or disturbance in surrounding networks. It uses machine learning to locate the exact point of the vibration, and it trains the system to separate background noise \u2013 like the rumble of traffic or roadworks, so that leaks stand out clearly \u2014 even in busy streets. The technology has big advantages over conventional detection methods, namely:<\/p>\n

\u27a4 Continuous monitoring:<\/strong> Existing leakage detection relies on targeted surveys and skilled field teams working systematically across the network. Fibre sensing complements this approach by providing 24\/7 monitoring, so leaks can be spotted sooner and reduce the time between surveys.<\/p>\n

\u27a4 No need to dig:<\/strong> It uses the fibre that\u2019s already in the ground \u2014 turning it into thousands of tiny \u201cvirtual sensors\u201d – making it cheaper, quicker, and more environmentally friendly.<\/p>\n

\u27a4 Targeted identification:<\/strong> The system recognises the unique acoustic \u201csignature\u201d of a potential leak and highlights an area to investigate \u2013 often to within a few metres, so repair teams are directed to the right spot.<\/p>\n

\u27a4 Reduced disruption:<\/strong> By identifying leaks earlier, water companies can address them before they cause significant disruption, cutting emergency callouts and minimising impact on customers and road users.<\/p>\n

\u27a4 Easy to scale:<\/strong> Using the national reach of Openreach\u2019s fibre network means the system can be scaled up across throughout the UK.<\/p>\n<\/blockquote>\n

In its first locations, and in just three months, the fibre sensing technology was able to locate more than 100 leaks \u2013 saving 2 million litres of water a day \u2013 equivalent to more than 700 million litres every year, enough to supply around 10,000 people.<\/p>\n

Trevor Linney, Director of Network Technology for Openreach, said:<\/strong><\/p>\n

\u201cThe results of our pilot show that our new full fibre infrastructure can deliver value far beyond broadband \u2013 and could prove to be a real game changer in solving real-world challenges like water conservation.\u201d<\/p>\n

Around 20 per cent of the UK\u2019s drinking water is lost to leaks with water conservation a significant and growing issue for the nation. And, what\u2019s great about this technology, is that it can be used to detect a whole range of things \u2013 from gas leaks to monitoring the health of big structures like bridges and tunnels. It has huge potential.\u201d<\/p><\/blockquote>\n

James Curtis, Head of Leakage at Affinity Water, added:<\/strong><\/p>\n

\u201cStrengthening how we identify and address leaks is central to our leakage strategy. By working with Lightsonic and Openreach, we\u2019re enhancing our existing detection programme with continuous network monitoring, helping our teams target areas of interest more quickly and reduce the time leaks may run before repair.<\/p>\n

This technology complements the expertise of our field technicians, supporting earlier intervention, better planning and reduced disruption for customers \u2014 all by using fibre that\u2019s already in the ground.\u201d<\/p><\/blockquote>\n

As we recall, the trial is currently only using “spare<\/em>” fibres in Openreach’s network to create a system capable of providing real-time data for multiple utilities, allowing costs to be shared. But the original plan envisaged this solution being expanded to work across Openreach’s active fibre network too, rather than having to install a dedicated sensing fibre network.<\/p>\n

If successful, London could potentially end up becoming the first city in the world to deploy an underground early warning system of this type. But the big challenge for this trial has been in adapting the technology to work for a scale deployment. Clearly the early results are promising, although we don’t know much about the costs of implementation and so at this stage it’s hard to judge the true viability.<\/p>\n

However, it\u2019s worth remembering that Openreach aren\u2019t the only fibre game in town, and it\u2019s possible that we might see rival networks \u2013 belonging to several different operators \u2013 being harnessed in the future in order to further improve such systems.<\/p>\n","protected":false},"excerpt":{"rendered":"

Network access provider Openreach (BT) has today revealed some of the first results from their ongoing trial of a new technology (here), which harnesses the operator\u2019s existing fibre optic broadband network to detect mains water leaks. In just three months, it’s already pinpointed 100+ leaks and is estimated to be saving 2 million litres of […]<\/p>\n","protected":false},"author":1,"featured_media":45019,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[52,56,69,477],"class_list":["post-45017","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uk_isp_news","tag-fibre-optic","tag-fttp","tag-bt-openreach","tag-science"],"share_on_mastodon":{"url":"https:\/\/mastodon.social\/@ispreview\/116215821283741093","error":""},"yoast_head":"\nOpenreach Trial Uses UK Broadband Network to Detect 100+ Water Leaks - ISPreview UK<\/title>\n<meta name=\"description\" content=\"Network access provider Openreach (BT) has today revealed some of the first results from their ongoing trial of a new technology (here), which harnesses\" \/>\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\/03\/openreach-trial-uses-uk-broadband-network-to-detect-100-water-leaks.html\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Openreach Trial Uses UK Broadband Network to Detect 100+ Water Leaks - 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