--- title: "Slough, Europe's Biggest Data-Center Hub, Runs Into the Power Grid's Limits" description: "The town of Slough, west of London, hosts one of Europe's densest clusters of data centers — and the AI boom is piling more demand onto a power grid already near its limits, even as residents complain about the heat the facilities throw off." category: "Tech" category_url: https://boursel.com/category/tech author: "Sofia Marchetti" published: 2026-06-26T07:30:00.000Z updated: 2026-06-26T07:30:00.000Z canonical: https://boursel.com/article/slough-europe-s-biggest-data-center-hub-runs-into-the-power-grid-s-limits tags: ["data-centers", "uk", "slough", "energy", "ai-infrastructure"] --- # Slough, Europe's Biggest Data-Center Hub, Runs Into the Power Grid's Limits The town of Slough, west of London, hosts one of Europe's densest clusters of data centers — and the AI boom is piling more demand onto a power grid already near its limits, even as residents complain about the heat the facilities throw off. The invisible infrastructure of the internet has to live somewhere. A lot of it lives in Slough. ## A commuter town turned digital backbone Slough, about 20 miles west of central London, has quietly become one of Europe's densest concentrations of data centers, clustered largely on the Slough Trading Estate — a vast industrial park owned by the FTSE 100 landlord SEGRO, which has developed dozens of data-center buildings there, [as the Guardian reported](https://www.theguardian.com/environment/2026/jun/26/slough-is-like-an-experiment-europes-largest-datacentre-hub-leaves-town-sweltering). Colocation operators including Equinix run major facilities in the town. The draw is the same set of advantages operators prize everywhere: proximity to London's customers for low-latency connections, dense fiber, and — historically — accessible grid power. ## Why data centers strain a place A data center is, in essence, an electricity-to-heat converter: it draws power continuously to run servers and exhausts most of it as heat, while consuming large volumes of water for cooling. Globally, the [International Energy Agency estimated](https://www.iea.org/reports/electricity-2024/executive-summary) data centers used roughly 460 terawatt-hours of electricity in 2022 and projected that could exceed 1,000 TWh by 2026 — comparable to a large country's entire consumption — with AI and cloud computing driving the surge. Concentrate enough of that demand in one town and the effects become local: residents near the Slough estate have complained of higher ambient heat, and the borough has flagged competition for scarce grid capacity. (The precise temperature impact has not been independently quantified in any study we could find; we report residents' accounts, not a measured figure.) ## The binding constraint: the grid The hard limit now is electricity, not land or money. Southeast England's distribution network has at times restricted new large data-center connections, and the queue of would-be projects waiting for grid access across the UK is large. That pits data centers — which pay premium connection fees and run around the clock — against housing developments competing for the same constrained capacity, a real tension in a town with acute housing pressure. The previous UK government designated data centers as Critical National Infrastructure in 2023, underscoring their strategic importance even as the power to feed them runs short. ## Why AI raises the stakes AI sharpens the squeeze. Where a conventional server rack might draw 5–10 kilowatts, AI-optimized GPU racks can need many times that, multiplying the power and cooling each new facility demands without using much more floor space. Both the previous and current UK governments have courted data-center investment as part of an AI strategy meant to keep Britain competitive with Ireland, the Netherlands and the Nordics. But that ambition collides with physics: building the capacity ministers want requires grid power the network can't yet reliably supply at scale, and new transmission takes years. ## Who gains, who bears it The economics are real on both sides. SEGRO earns long-term rents from data-center tenants on decade-plus leases; operators like Equinix run high-utilization, recurring-revenue businesses; the town gets tax revenue, construction jobs and a place in critical digital infrastructure. The costs fall differently — on residents living with the heat and on a council managing a borough reshaped by power-hungry buildings while housing waits in the grid queue. None of that makes the cluster a net negative, but it complicates the easy story that data centers are simply an economic win. As AI demand climbs, Slough is an early, concentrated test of a question every advanced economy now faces: where does the power come from? This is reporting and analysis, not investment advice. ## Sources - ['Slough is like an experiment': Europe's largest datacentre hub leaves town sweltering](https://www.theguardian.com/environment/2026/jun/26/slough-is-like-an-experiment-europes-largest-datacentre-hub-leaves-town-sweltering) - [Electricity 2024](https://www.iea.org/reports/electricity-2024/executive-summary)