UK datacenter approvals: four front doors, and power sets the date

Four front doors, one critical path

A company that wants to build a UK datacenter has to work out which department owns which part of the decision, and the answer is not one department. Following the summer reshuffle that removed the Department for Science, Innovation and Technology, liaison with the tech industry on datacenter construction moved to the Department for Business, Innovation, Science and Trade, while digital infrastructure sits within the Department for Digital, Culture, Media and Sport.

Power is a separate conversation again. As The Register sets out, getting electricity to a facility falls to the Department for Energy and Net Zero. Planning permission rests with local government, while overall planning policy lies with the Ministry of Housing, Communities and Local Government. That is four bodies before a single rack is ordered, and none of them shares a desk with the others.

For an enterprise sizing a UK capacity plan, the critical path is not the build itself but the slowest of several parallel approval tracks, each with its own queue and its own definition of a complete application. The table is the map to put in front of whoever signs the capacity commitment.

The minister says the lines are clear

Liz Lloyd, parliamentary under-secretary of state, holds a portfolio spread across BIST and DCMS. Appearing before the House of Commons Science and Technology Committee this week, she set out where each responsibility landed after DSIT was wound up: telecoms with DCMS, datacenters with BIST.

She acknowledged that some departmental responsibilities overlapped, then argued the split is legible from the outside. "In terms of sector responsibilities, that is clear that technology, sorry, that telecom sits with DCMS and datacenters with BIST," she told MPs. "When you're actually in an industry or you're trying to run a business, that that that is clear."

The Register's own reconstruction of the path is less tidy: a builder may be clear that datacenter policy is BIST's, and still have to take the power question to Energy and the planning question to a council and to MHCLG. Clarity about which department owns a sector is not the same as a single application route, and the gap between the two is where schedule risk accumulates. A named owner in each body is worth more than a policy statement that the map is simple.

Power, not paperwork, ended the largest project

The coordination problem has a documented cost. Earlier this month, Microsoft pulled out of plans for Britain's largest AI supercomputer because of difficulties securing power for the facility. That is a hyperscaler with the legal and engineering resources to work any approval maze, and the constraint that ended the project was electricity, not a form. The Register's coverage put it plainly: Microsoft abandoned the UK AI supercomputer as the grid struggled to keep up.

Officials have not resolved the grid struggles that blocked that project, according to the same reporting. For an enterprise planning UK capacity, that reframes the due diligence order: power availability and the connection timeline deserve to be tested before the site, the design or the planning strategy. A site with a clear planning path and no credible connection is a site that does not get built, and the lease or option payment runs while the connection queue moves.

The £45 billion figure is not a budget line

The same committee hearing produced a correction worth recording, because it is the kind of number that ends up in business cases. MPs asked Lloyd about the government's early 2025 claim that modernising ageing technology and digitising processes could deliver £45 billion in productivity savings.

Lloyd said the government stands by the figure only as an estimate of long-term gains. "The £45 billion figure was an estimate of long-term productivity gains," she said. "It wasn't a kind of one-off figure for savings... it was never a figure that was a target or a cashable savings figure."

The January 2025 press release carried the headline "Archaic tech sees public sector miss £45 billion annual savings" and said taxpayer-funded services from the NHS to local councils were missing out on that sum because they depended on old technology. A long-run productivity estimate and an annual cashable saving are different instruments, and only the second belongs in a budget line. Anyone building a datacenter business case on public-sector savings should quote the estimate as an estimate or leave it out.

The three objections a capacity plan raises

The first is that the minister says the lines are clear, so one application should do. Clarity about sector ownership is not a single route, and the power and planning tracks sit outside BIST. The second is that planning is the long pole. It can be, but the only recent large project to stop did so on power, and the planning regime publishes more about its process than the connection queue does.

The third is that the £45 billion savings figure funds the programme. It is an estimate of long-term productivity gains, not a cashable annual saving, and the minister has said so on the record. A business case that treats it as available cash is arguing from a number the government has already clarified.

The decision rule for a UK capacity commitment

If the workload can run in an existing UK region or in another country, the split approvals are a reason to keep it there until a site has a confirmed connection date. The coordination cost is real and it lands on the schedule, not on the lease.

If the workload must sit in the UK, sequence the work so that grid capacity is proven first, planning second and construction last. Ask each body in the table for its requirements and its service time in writing, and treat a missing answer as a schedule risk rather than a formality. The reporting does not publish service times for any of the four, so the only honest planning input is the answer each body gives your project.

Then put the map in front of whoever signs the capacity commitment. The number that moves the date is the connection, not the lease, and the approval path has four owners who do not share a calendar.