Research pillar
AI Electricity Demand
How much electricity artificial intelligence actually uses in Britain, what can be measured, what can only be modelled, and how the two are told apart.
Featured analysis
Why Data Centre Megawatt Announcements Can Mislead
Megawatts measure power, not electricity used. A practical guide to IT load, connection capacity, PUE and the five questions to ask about any data centre capacity announcement.
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Could AI Use More Energy Than It Saves in the UK?
AI can reduce wasted energy in buildings, factories, transport and the electricity grid. However, rapidly expanding data-centre demand could consume those savings. The answer depends on how Britain chooses to use and power AI.
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How Many Data Centres in the UK Are There Devouring Energy?
What official sources actually say about how many UK data centres exist, how much capacity they have, how much electricity they use today and what NESO projects for 2035.
Read analysisFrom the UK AI Energy Index
Every indicator carries its source, the period it covers and a confidence level. Where the evidence is insufficient, the Index says so rather than estimating.
Tools for this subject
All outputs are modelled estimates based on the inputs you provide, not measured values.
Related reports
- AI & EnergyAI Search vs Traditional Search: Electricity, Water & Carbon Index 2026The environmental cost of AI-generated answers versus conventional search, benchmarked for UK decision-makers. An independent, evidence-based comparison of electricity, water and carbon per query across Google, Gemini, ChatGPT, Copilot, Perplexity and Claude — with forecasts to 2035.
- AI & EnergyUK AI Energy Report 2026The definitive UK view of AI's electricity, grid and infrastructure impact in 2026. An independent, evidence-based report on demand growth, data centre build-out, AI Growth Zones and the trajectory to 2035 — for UK policymakers, operators and investors.
- AI & EnergyUK AI Energy Outlook 2027The annual flagship report: electricity demand, data-centre expansion, grid capacity and the infrastructure required to support UK artificial intelligence — covering 2024–2035 with every figure sourced, dated and evidence-graded.
Recent news in this pillar
All news →Clean Energy Sector to See Significant Job Growth by 2030, with AI Competency Rising
Read at gov.uk ↗
Plans submitted for 110MW data centre at former Microsoft UK headquarters site in Reading
Read at bbc.com ↗
GridCARE Index identifies potential for significant existing grid capacity optimisation
Read at markets.ft.com ↗
US power demand forecast to reach record highs by 2027, driven by AI data centres, EIA reports
Read at reuters.com ↗
AWS Plans Large Data Centre Campus in Pennsylvania with Dedicated 4.5GW Gas Power
Read at datacenterdynamics.com ↗
Google explores space data centres amidst terrestrial AI energy concerns
Read at thetimes.com ↗
How we research this
We work from primary UK sources — DESNZ, NESO, Ofgem, planning authorities and published company documents. Where a figure is modelled by us it is labelled an AI Energy Intelligence modelled estimate, with its assumptions shown. Where the evidence does not exist, we say so.