UK Digital Infrastructure Investment Reaches £11.2 Billion in 2025

Key Points

• UK digital infrastructure investment reached £11.2bn in 2025, nearly three times the previous official figure of £3.6bn, according to the Office for National Statistics (ONS).
• The ONS confirmed that the increase reflects a broader definition of digital infrastructure rather than new spending.
• On a like-for-like basis, investment fell by £0.5bn, or 4.0%, from 2024.
• The expanded measure now covers data centre buildings, hardware, network software and radio spectrum permits, as well as telecoms structures.
• Hardware investment rose 54.6% in 2025 to £0.7bn, its highest level since 2006, driven by data centres supporting cloud computing and AI.
• Government grants accounted for 5.7% of market sector digital infrastructure investment in 2024, worth £0.7bn, the highest share recorded in the series.
• Project Gigabit’s target for nationwide gigabit broadband coverage has been pushed back from 2030 to 2032 following the 2025 spending review.
• Bank of England governor Andrew Bailey warned that AI deployment may need to be rationed because of limited energy capacity.
• The ONS said the new figures are experimental “statistics in development” and should not be used for policy decisions.
• Barbour ABI data cited by industry figures suggests UK data centre investment could reach £10bn a year by 2029, compared with an estimated £1.75bn currently.

London (Britain Today News) August 25, 2026 – Britain’s businesses ploughed £11.2bn into digital infrastructure last year, roughly three times the amount previously reported under the official measure, new figures from the Office for National Statistics show. The headline rise, however, masks an underlying fall in real spending, with the ONS confirming that almost none of the increase reflects new money entering the economy.

How Much Did UK Digital Infrastructure Investment Reach In 2025?

The ONS published the revised figures on Monday, showing that digital infrastructure investment across the UK reached £11.2bn in 2025. That compares with £3.6bn under the previous, narrower headline measure, which counted only investment in telecommunications structures.

The statisticians were explicit about what the new number represents and, crucially, what it does not. According to the ONS release, the body stated:

“We are not identifying new investment outside existing capital formation data.”

Instead, the expanded definition simply reclassifies a greater share of spending that was already occurring within the wider economy as belonging to digital infrastructure.

Why Has The Headline Figure Tripled Overnight?

The threefold increase stems entirely from methodology rather than market activity. The ONS’s original headline measure was narrowly focused on telecoms structures — largely masts, cables and exchange buildings. The expanded measure widens the net considerably, now capturing data centre buildings, computer hardware, network software and radio spectrum licences.

This means a single data centre, which was previously almost invisible to the statistics, is now captured across multiple categories at once: its shell counted under buildings and structures, its servers under hardware, and its operating systems under software and databases.

Why Did Investment Actually Fall In 2025?

Despite the headline jump, the underlying trend points downward. Investment fell by £0.5bn compared with 2024, a decline of 4.0%. Even so, 2025 still ranks as the third-highest year in a data series stretching back to 1997.

The longer-term trajectory remains upward. By 2023, digital infrastructure investment had climbed 51% above pre-pandemic 2019 levels, comfortably outpacing the 19% rise in total UK business investment across the same period.

Which Asset Classes Are Driving The Spending?

Two categories accounted for 84.0% of all digital infrastructure investment in 2025. The largest is “other buildings and structures,” worth £5.6bn, which now captures data centre premises alongside fibre networks and mobile base stations. That category has expanded by 83.8% since the onset of the 2020 pandemic.

Software and databases came second, totalling £3.8bn — up almost 95% since 2021 — and now representing roughly a third of the entire measure.

Why Did Hardware Investment Reverse Its Long Decline?

Computer hardware spending had been shrinking for years, but that trend flipped in 2025. Hardware investment rose 54.6%, an increase of £0.3bn, taking the total to £0.7bn — its highest level since 2006. The ONS attributed the rebound directly to data centres expanding their physical capacity to support cloud computing and artificial intelligence workloads.

Why Did The Old Measurement Method Miss So Much Investment?

The previous approach focused narrowly on structures built within the telecoms industry itself, which meant it captured very little of the broader data centre boom. The revised methodology extends beyond telecoms and into the data processing and hosting sector, where much of the recent investment has actually occurred.

The ONS considered including publishing and broadcasting activity within the expanded measure but ultimately excluded it, reasoning that these sectors produce content rather than the physical infrastructure required to move it.

Why Have Data Centres Been Classified As Critical National Infrastructure?

The scale of investment has already prompted a formal policy response. The government designated data centres as Critical National Infrastructure in 2024, placing them alongside energy and water supply in terms of strategic importance.

Hyperscale facilities — large sites built and operated by global technology companies for their own use — accounted for around 63% of all data centre development activity in the UK during 2025.

What Is Driving Demand For Digital Infrastructure?

Business adoption of artificial intelligence has surged. ONS survey data shows that the proportion of UK businesses with ten or more employees using AI rose from around 12% in late 2023 to 35% this year. That growth builds on an already substantial cloud computing base, with roughly 69% of firms using cloud systems as far back as 2023 — the foundation on which most AI deployment depends.

Separate analysis from Oxford Economics found that the number of UK data centres increased by more than 400% between 2000 and 2024, underlining how rapidly the physical footprint of the sector has expanded.

How Large Is The Future Investment Pipeline?

Construction data from Barbour ABI identifies 171 data centre projects that have either broken ground in the past year or are expected to begin within the next five years. Industry estimates built on that pipeline suggest UK data centre investment could climb to £10bn annually by 2029, up from a current estimated annual figure of around £1.75bn.

How Much Public Money Has Gone Into Digital Infrastructure?

Government grants remain a modest but growing share of total investment. They funded 5.7% of market sector digital infrastructure investment in 2024, worth £0.7bn — up sharply from £0.2bn in 2023 and the highest proportion recorded across the entire series.

Across the full period from 1995 to 2024, cumulative government grants reached £3.7bn, dwarfing the £0.5bn the state has spent on communications assets it owns directly. The vast majority of investment remains privately funded: the market sector invested £11.6bn in 2024 alone, financing £11.0bn of that itself. Telecoms operators contribute heavily to this total, with Ofcom recording fixed-network spending of £6.8bn in 2024, of which 77% went into full-fibre access networks.

Why Has The Project Gigabit Rollout Been Delayed?

Project Gigabit, the government’s £5bn broadband scheme, has disbursed £2bn between 2020 and 2025. The programme was originally intended to deliver nationwide gigabit-capable broadband coverage by 2030. Following the 2025 spending review, that target has been pushed back to 2032.

Is Power Supply Constraining Britain’s Data Centre Growth?

Energy capacity has emerged as a central constraint on further expansion. Andrew Bailey, governor of the Bank of England, warned that artificial intelligence deployment “may have to be rationed” because a shortage of available power will limit how widely any sector can adopt it.

The warning reflects problems already surfacing on the ground. Grid connection delays have affected data centre projects in Essex, while concerns have been raised within the water industry about supply pressures linked to data centre cooling requirements. The constraint is not unique to Britain, and some capital is already shifting elsewhere, with Southeast Asia reportedly planning to quadruple its current data centre capacity. Even so, investment announcements in the UK have continued, including a series of AI-related commitments made during London Tech Week in June.

How Reliable Are These New ONS Figures?

The ONS has been unusually direct about the limitations of its own release. The statisticians stated plainly that these figures “are not official statistics” and should not be relied upon for policy or decision-making purposes. They are described instead as research into an alternative measurement method, published in the category of “statistics in development,” with the ONS explicitly advising caution in their use.
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What Is Still Missing From The New Measurement?

Several gaps remain. The measure excludes data itself, because no reliable UK estimates currently exist — even though data is arguably the core output that data centres exist to process. Cooling systems, power distribution equipment and server racks are also absent, though the ONS says it will consider adding them in future revisions.

A classification gap also persists. Where a property company owns a data centre building, that spending is currently filed under real estate rather than digital infrastructure, meaning it does not appear in these figures at all.

What Happens Next For Measuring UK Digital Investment?

The ONS intends to fold the expanded definition into its main infrastructure publication once the OECD reaches international consensus on how these assets should be measured. The agency is also developing a separate AI account to track AI-related investment across the wider economy, as Britain continues to attract private funding for sovereign AI capability.

Until an agreed international standard is settled, the true scale of Britain’s digital infrastructure buildout will continue to depend heavily on which measure is being quoted.