ONS Sheds Light on Data Centres' UK Economic Footprint Amidst AI Boom

25 August 2026 28 min readSource: ons.gov.uk
Data centres and the UK National Accounts - Office for National Statistics

Executive summary

The Office for National Statistics (ONS) has published a methodology article detailing how data centres, crucial for AI and cloud computing, are currently accounted for within the UK's economic statistics. It highlights their recent designation as critical national infrastructure and the challenges in separately identifying their investment and output. This forms part of a broader effort to track the digital economy and develop an AI thematic account.

Reporting based on ons.gov.uk

Why it matters

This analysis is vital for understanding how the foundational infrastructure for AI and cloud computing is integrated into the UK's economic measurements. For a UK audience interested in AI and energy, it clarifies the current statistical visibility of data centres, their rapid growth, and their escalating energy consumption, which directly impacts energy planning and grid considerations.

Sector impact

Analysis by AI Energy Intelligence UK

UK electricity demand

Data centres in Great Britain consumed an estimated 4.5 terawatt-hours (TWh) in 2024, representing 2% of total grid electricity consumption. This marks a 41% (1.3 TWh) increase between 2020 and 2024. As AI and cloud use expand, data centre and related energy demands are projected to continue growing.

UK energy security

The designation of data centres as critical national infrastructure, alongside energy and water supply, reinforces their importance for national infrastructure planning. Their increasing electricity demand, particularly from hyperscale facilities often built outside city centres due to land and power constraints, signifies a growing reliance on a robust and sufficient energy supply to support these essential services.

Businesses

The article acknowledges a substantial expansion of the UK data centre industry over the last two decades, driven by growth in hyperscale facilities developed by major cloud providers or specialist co-location operators. The ONS aims to improve the statistical capture of investment and output related to data centres, which will provide businesses with clearer economic insights into this rapidly growing sector.

Consumers
Not directly addressed by the source.

Key statistics

4.5 terawatt-hours (TWh)
Data centre electricity consumption (GB, 2024)
2%
Share of GB grid electricity (2024)
1.3 TWh (41%)
Increase in data centre electricity consumption (2020-2024)
221
Number of data centres (GB, 2020)
239
Number of data centres (GB, 2024)
52
Number of data centres (UK, 2000, Oxford Economics)
266
Number of data centres (UK, 2024, Oxford Economics)

Figures as reported by ons.gov.uk. See original source for context.

Long-term implications

The ONS's initiative to develop an AI thematic account and improve the measurement of digital infrastructure, including data centres, indicates a long-term commitment to understanding the economic impact of AI. This improved statistical framework will be crucial for policy-makers and energy planners to anticipate and manage the increasing demand for power that accompanies AI and cloud computing growth, potentially influencing future grid development and energy policy.

Artificial Intelligence (AI)Cloud ComputingHigh-Performance Computing (HPC)Data StorageServer Hosting

Frequently asked questions

What is the ONS's primary goal with this article?

The ONS aims to explain how data centres, crucial for AI and cloud computing, are reflected in the UK's economic statistics and to outline efforts to improve their statistical identification and measurement within the digital economy.

Are data centres considered critical national infrastructure in the UK?

Yes, data centres are now designated as critical national infrastructure in the UK, placing them alongside essential services like energy and water supply.

How much electricity do UK data centres consume?

Data centres in Great Britain consumed an estimated 4.5 TWh of electricity in 2024, representing 2% of the total electricity consumed from the grid.

Has data centre electricity consumption increased recently?

Yes, between 2020 and 2024, data centre electricity consumption increased by 1.3 TWh, a rise of 41%.

Original source

This story summarises reporting from ons.gov.uk. Read the original for full context.

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The measured evidence behind this story

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

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