How will AI Boom Fuel Major UK Data Centre Expansion?

The UK is set for a surge in data centre construction as the demand for AI processing power drives one of the biggest infrastructure expansions in years.

Construction researchers Barbour ABI report that the country’s data centre count will grow by almost a fifth, with close to 100 new facilities in planning. Many are scheduled to be completed within the next five years, adding to the 477 already in operation. This expansion will cement the UK’s position as the third-largest global data centre market after the US and Germany.

Megan Pounds, Demand Generation Marketing Manager at Barbour ABI, links the boom directly to AI: “As AI becomes an undeniable integration in our everyday lives, it’s also a major factor in driving the surge of data centre construction projects in the UK.

"The UK’s digital infrastructure is relying on more data centres to be built to store and manage data. However, where there is a rise in the demand of building more data centres, there’s also the expected spike in energy usage that must be addressed.”

She also warns that the sector must adapt quickly to support the UK’s Net Zero 2050 targets. “While many data centres are shifting towards renewable energy sources, the pace of this transition is slower than the growth in demand for data services.”

Where AI infrastructure is growing fastest

More than half of the planned facilities will be in London and nearby counties. Wales is set for nine, Scotland one, Greater Manchester five, and other sites will be spread across the rest of the UK.

Projects backed by US technology giants are among the largest. Blackstone Group is planning a £10bn (US$13.6bn) AI data centre in Blyth, near Newcastle, covering 540,000 square metres across 10 buildings. Construction is expected to begin in 2031 and last over three years.

Microsoft is investing £330m (US$447.3m) in four UK facilities, two in Leeds, one near Newport in Wales and a five-storey site in Acton, London, due between 2027 and 2029. Google is building two north-east London sites worth £450m (US$610m) and covering 400,000 square metres in the Lee Valley water system area.

Energy demand and environmental strain

The UK Government classifies data centres as critical national infrastructure, essential for AI development and digital services. But their rapid expansion raises serious concerns over energy and water consumption.

In the US, some residents have seen household electricity bills rise due to local data centre operations. Dr Sasha Luccioni, AI and Climate Lead at Hugging Face, warns the UK could face similar issues: “Average citizens in places like Ohio are seeing their monthly bills go up by £15 (US$20) because of data centres.” She describes the UK’s rollout schedule as “aggressive” and urges companies to shoulder the costs of the extra power they use.

The National Energy System Operator projects that the growth in UK data centres could add 71 TWh of electricity demand over the next 25 years, intensifying the need for clean power sources such as offshore wind.

Water use is another pressing issue. Many data centres rely on large-scale water cooling, and operators often do not disclose consumption levels. Steve Hone, CEO of The Data Centre Alliance, acknowledges the challenge: “Ensuring there is enough water and electricity powering data centres isn’t something the industry can solve on its own,” while stressing that operators are “fixated with becoming as sustainable as possible” through methods like dry cooling.

Political commitment to AI growth

Environmental objections have already slowed some projects. In Potters Bar, Hertfordshire, locals are opposing a £3.8bn (US$5.2bn) AI and cloud facility on greenbelt land. In Dublin, new data centres have been halted due to the pressure they place on Ireland’s power grid, which saw them consume one fifth of the nation’s electricity in 2023.

Prime Minister Keir Starmer has tied the sector’s growth to wider economic ambitions:

"Artificial Intelligence will drive incredible change in our country. From teachers personalising lessons, to supporting small businesses with their record-keeping, to speeding up planning applications, it has the potential to transform the lives of working people.

"But the AI industry needs a government that is on their side, one that won’t sit back and let opportunities slip through its fingers. And in a world of fierce competition, we cannot stand by. We must move fast and take action to win the global race.

"Our plan will make Britain the world leader. It will give the industry the foundation it needs and will turbocharge the Plan for Change. That means more jobs and investment in the UK, more money in people’s pockets and transformed public services."

The government has also set up an AI Energy Council to coordinate supply with demand and announced £104bn (US$141bn) of investment in water infrastructure.

With AI’s role in daily life expanding and infrastructure demands growing, the challenge for the UK will be ensuring this rapid data centre buildout delivers both technological progress and environmental responsibility.