Key Takeaways
- Over 100 UK data‑centre projects are seeking gas connections because grid access is delayed, collectively requesting >15 TWh/year (enough to power London for ~4½ months).
- Some developers now ask for permanent gas supplies of 100 MW or more, moving away from using gas only as a temporary backup.
- The surge in gas‑powered data centres threatens the UK’s Clean Power 2030 goal of limiting unabated gas to <5 % of electricity supply.
- Ofgem and National Energy System Operator (Neso) acknowledge the bottleneck and are reforming connection processes, but stress that strategic prioritisation may be needed for AI‑related projects.
- Environmental groups warn that reliance on fossil fuels for AI infrastructure ignores decades of climate science and risks worsening local air quality and emissions.
Grid Connection Bottleneck Drives Gas Interest
The UK’s electricity network is currently overwhelmed by a queue of data‑centre proposals totalling roughly 100 GW of potential load. Stuart Okin, director of cyber regulation and AI at Ofgem, explained that many of these projects will never secure a grid connection in the near term, forcing developers to look for alternative power sources. This situation is not a fleeting hiccup; it reflects a systemic delay in upgrading transmission infrastructure to keep pace with the rapid expansion of AI‑driven computing demand.
Scale of Gas Connection Requests
Silvia Simon, head of research at Future Energy Networks, reported that her organisation has received more than 100 gas‑connection applications from data‑centre operators in the last two years. Combined, these requests represent over 15 terawatt‑hours of electricity annually—enough to supply London for about four and a half months. The figure underscores how substantial the unmet electricity demand has become and why gas is being viewed as a viable, albeit carbon‑intensive, stopgap.
Shift from Backup to Primary Power
Historically, data‑centre developers avoided gas because of its carbon footprint, permitting complexities, and land‑use concerns, reserving it only for temporary resilience measures. An energy consultant with years of sector experience noted a marked change: developers are now asking for permanent gas supplies, sometimes exceeding 100 MW per site. This shift indicates that gas is no longer seen as a short‑term fix but as a primary energy source for projects that cannot wait for grid upgrades.
Implications for UK Climate Targets
Julian Leslie, director of strategic planning at the National Energy System Operator (Neso), warned that the proliferation of unabated gas‑powered data centres could jeopardise the UK’s Clean Power 2030 objective, which aims to keep unabated gas below 5 % of the electricity mix. If a significant portion of new AI infrastructure runs on gas without carbon capture, the national emissions trajectory will diverge sharply from the pathway required to meet legally binding climate commitments.
Regulatory Response and Grid Reform
Eleanor Warburton, Ofgem’s director for energy system design and development, acknowledged that the AI boom is reshaping energy demand patterns. She stated that while connections are being processed, the system must improve to accommodate viable, ready‑to‑proceed projects. Ofgem is currently reforming demand‑connection procedures to speed up approvals and is examining whether strategic prioritisation—potentially favouring AI‑related developments—should be introduced to alleviate the bottleneck.
Environmental and Community Concerns
Kat Jones, director of Action to Protect Rural Scotland, criticised the prevailing attitude among AI‑data‑centre proponents, arguing that they operate as if the last half‑century of climate science had not occurred. She warned that onsite gas generation would exacerbate local air pollution and contribute to broader climate breakdown, pointing out that conference discussions often treat fossil‑fuel backup as an inevitable necessity rather than a problem to be solved.
Parallels with US Experience
The situation in the UK mirrors trends observed in the United States, where hyperscale data centres serving firms such as Meta, OpenAI, Microsoft, and Elon Musk’s xAI increasingly rely on off‑grid gas generators. Activists in Tennessee have challenged xAI’s use of methane‑powered turbines, citing health risks to nearby communities. Analyses suggest that eleven US data centres built for these companies could collectively emit more carbon than the entire nation of Morocco, highlighting the climate cost of unchecked fossil‑fuel reliance in the AI boom.
Outlook and Potential Solutions
Without accelerated grid upgrades or widespread adoption of low‑carbon alternatives—such as renewable‑plus‑storage, hydrogen, or nuclear—data‑centre operators are likely to continue turning to gas. Policymakers face a trade‑off: enabling rapid AI infrastructure growth to maintain economic competitiveness versus upholding stringent climate targets. The ongoing reforms to connection prioritisation, coupled with incentives for clean onsite generation, may offer a path to reconcile these competing demands, but decisive action will be required soon to avoid locking in high‑emission infrastructure for decades.