Agentic AI Risks Supercharging UK Data Centre Power Demands

24 September 2026 21 min readSource: ft.com
Just how much power will AI need?

Executive summary

The rapid growth of Artificial Intelligence (AI), particularly 'agentic AI', is projected to significantly increase electricity demands from data centres globally. While current AI power usage is a small fraction of global emissions, its exponential rise could place considerable strain on energy grids, necessitating a shift towards renewable energy sources.

Reporting based on ft.com

Why it matters

The UK, with its growing digital economy and ambitions in AI, will not be immune to these global trends. Increased energy demand from AI infrastructure could challenge the National Grid's capacity, potentially impacting energy security and necessitating significant investment in renewable generation and grid upgrades to avoid reliance on fossil fuels.

Sector impact

Analysis by AI Energy Intelligence UK

UK electricity demand

Data centre power usage is projected to increase by 17 per cent in 2025 alone, doubling by 2030, according to the IEA. Agentic AI systems, which are autonomous and perform complex tasks, could demand significantly more power per query; one study found they used up to 136.5 times more energy than a basic chatbot session. A scenario where daily agentic AI requests match current Google searches could create nearly 200 gigawatts of new power demand, about half the current US power grid load.

UK energy security

The article highlights that in the US, data centre developers are commissioning their own power plants, often gas-fired, to secure electricity supply amidst rising demand. This trend, if mirrored in the UK, could undermine efforts to decarbonise the electricity supply and create new dependencies on fossil fuels, posing a challenge to the UK's energy security and climate commitments.

Businesses

Businesses deploying agentic AI at scale will face increasing energy costs and procurement challenges. The article notes that data centres' rising energy demands have already pushed electricity prices higher in parts of the US. Companies developing AI solutions, such as Meta with its 'Muse' agent, are driving towards mass consumer adoption, which could further amplify energy requirements.

Consumers

While not directly stated, the article implies potential indirect impacts on consumers. Rising electricity demand from AI data centres could contribute to higher energy prices, as has been observed in parts of the US. Increased reliance on fossil fuels to power these centres could also affect air quality and contribute to climate change, with broader societal costs.

Key statistics

17 per cent
Data centre power usage rise in 2025
136.5 times more
Agentic AI energy use per query vs basic chatbot
200 gigawatts
Projected new power demand from 13.7bn daily AI agent requests
51.7GW
Renewables and battery storage capacity growth in US (last year)
2.7GW
Net gain fossil-fired power in US (last year)
189GW
Announced gas generation tied to data centres in US

Figures as reported by ft.com. See original source for context.

Quotations

"Energy-guzzling artificial intelligence is driving up planet-heating pollution from coal, oil and gas"

UN climate change head Simon Stiell

"should be put in perspective"

Al Gore

Long-term implications

The long-term implications point towards a critical juncture for the global energy system. The anticipated exponential growth in AI's energy footprint necessitates a rapid acceleration in renewable energy deployment and innovative grid solutions. Failure to address this demand with clean energy could lead to a significant increase in carbon emissions and heightened pressure on national electricity infrastructures.

Agentic AIChatbotsLarge Language Models (LLMs)Data CentresRenewable EnergyBattery StorageGas Power

Frequently asked questions

How much electricity do data centres use currently?

Power usage by data centres currently accounts for well below 1 per cent of global emissions, according to the International Energy Agency.

What is 'agentic AI'?

Agentic AI refers to autonomous bots that can perform highly complex tasks without direct supervision or guidance.

How much more energy does agentic AI use compared to basic chatbots?

Research by the Korea Advanced Institute of Technology found an agentic AI system could use up to 136.5 times more energy per query than a basic chatbot session.

Original source

This story summarises reporting from ft.com. Read the original for full context.

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Evidence base

Evidence behind this story

Our reporting sits on top of the UK AI Energy Index and Data Centre Tracker — a sourced, dated record of AI and data-centre electricity demand, data-centre development and grid pressure.