The UK government has published a Data Centre Covenant alongside its Autumn Budget, setting out the tests operators must meet if they want state help to jump the electricity connection queue. The policy paper, released by HM Treasury on 28 October, also opens the door to temporary on-site generation for a small number of projects deemed exceptionally strategic.
What the covenant sets out
The covenant applies a two-tier approach. All data centres are encouraged to meet its tests, but those classed as “strategic” must meet them to qualify for additional government action on grid access and planning. The government has not yet published the definition of a strategic data centre or the criteria for qualifying, saying these will follow in due course.
Support for qualifying sites will be considered by a new Ministerial Control Centre chaired by the Minister for AI. The tools on offer include reserving and reallocating grid capacity using powers in the Planning and Infrastructure Act, working with the National Energy System Operator (NESO) and network companies to find capacity available before 2030, and transferring pre-2030 connection contracts to strategic projects where necessary.
Where those measures cannot secure capacity in time, the government says it will develop a “tightly controlled” framework allowing temporary on-site generation until a grid connection is available. It is limited to exceptional projects and subject to conditions including energy security.
The tests and the numbers
The conditions are grouped around electricity bills, local communities, the environment, jobs and industry, and security. They include:
- paying a fair share of energy system costs and making credible commitments for the grid capacity requested;
- a Local Benefit Plan agreed with the host community, scaled to the size of the development (mandatory for strategic sites);
- designing new facilities to a power usage effectiveness (PUE) of 1.3 or better, using closed-loop water systems where practical, and reusing waste heat where a viable local user exists;
- annual reporting of energy and water consumption;
- local jobs, paid apprenticeships and priority for UK suppliers, plus cooperation with the National Cyber Security Centre and secure compute access for critical services such as the NHS.
The government estimates the UK will need 6GW of AI data centre capacity by 2030. The paper also confirms support for Ofgem’s queue management measures, more scope for developers to self-build connection infrastructure, and continued delivery of five AI Growth Zones across England, Scotland and Wales. A draft Data Centre National Policy Statement is out for consultation until 8 January 2027, according to Capacity Media; it is aimed at large projects, indicatively those of at least 100MW of IT load.
Why it matters for modular and edge in Europe
The covenant is written with large AI campuses in mind, and the paper sets no megawatt threshold and makes no specific reference to smaller edge or modular sites. Even so, several provisions are directly relevant to the sector.
The temporary on-site generation framework, if it materialises, would formalise the kind of bridging power that factory-built power and compute modules are often designed to provide while a permanent connection is delivered. The PUE design target of 1.3 and the expectations on closed-loop cooling and heat reuse are also likely to feed into the specifications of prefabricated data halls and modules sold into the UK market.
The bigger question for smaller operators is how “strategic” is defined. If priority grid access is reserved for large AI sites, edge and modular developers seeking modest connections could find themselves further back in a queue that is being actively reshuffled. Their main route may instead lie in the wider reforms, such as self-build connections and more flexible connection offers, and in the UK supply-chain preference, which could favour domestic module manufacturers.
Elsewhere in Europe, governments are also attaching conditions to grid access for data centres, which makes the UK’s final eligibility criteria worth watching beyond its borders.
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