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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →UK data infrastructure was designated Critical National Infrastructure (CNI) on 12 September 2024. The designation brings physical data centres and cloud infrastructure into existing government coordination arrangements; it does not, by itself, certify a facility or impose one uniform set of new legal duties on every operator. A separate regulatory framework described in a June 2026 government factsheet would bring qualifying data centres into the UK’s Network and Information Systems (NIS) regime, subject to legislation and secondary rules.
What does CNI status mean for UK data centres?
The government’s 12 September 2024 announcement designated UK data infrastructure as CNI. In a written statement to Parliament, Baroness Jones of Whitchurch defined it as “the physical data centres and cloud infrastructure which provide the foundations of the digital economy.” The statement said the infrastructure would be managed through existing cross-government CNI structures as a sub-sector of Communications, with the Department for Science, Innovation and Technology (DSIT) working across government and with the Energy and Water sectors.
CNI status is an institutional recognition of the infrastructure’s importance and exposure to risk. It is intended to improve government visibility, engagement and coordination. The announcement described closer monitoring and anticipation of threats, prioritized access to security agencies including the National Cyber Security Centre, and coordination with emergency services during an incident as examples of expected support. These arrangements do not guarantee that attacks or outages will be prevented, or that services will remain uninterrupted.
The government says data centres support public services and economic activity. DSIT’s 2026 factsheet says 28% of UK businesses and 62% of large businesses rely on data-centre services. It also reports that data-enabled activity accounted for 6.9% of UK GDP in 2022 and 76% of UK service exports. Those figures describe the importance of digital infrastructure; they do not mean that every business depends on the same facility or faces the same risk.
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Why does the government say the infrastructure needs protection?
The risks extend beyond cyberattacks. Baroness Jones’s parliamentary statement identified cyber and physical threats, as well as climate-related hazards including flooding and heatwaves that can disrupt operations or compromise services. Data-centre continuity can also depend on electricity, water, communications links, site security, facilities controls and suppliers. An incident or constraint in one of those dependencies can affect the services hosted at a facility.
The government’s emphasis on coordination with Energy and Water reflects those connections. Resilience therefore involves more than an operator’s cybersecurity: it also raises questions about power continuity, physical protection, extreme weather, water availability and the ability to respond across sectors.
How is CNI designation different from the proposed NIS rules?
The 2024 designation and the later regulatory proposal are separate policy layers. CNI status concerns how government recognizes and coordinates around important infrastructure. The Cyber Security and Resilience Bill framework described in DSIT’s factsheet, updated 30 June 2026, would create regulatory duties for qualifying operators through amendments to the NIS Regulations.
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| Policy layer | What it does | Status and scope |
|---|---|---|
| CNI designation | Places data infrastructure within cross-government CNI coordination, intended to improve visibility and cooperation on threats and incidents. | Announced 12 September 2024. The parliamentary statement describes physical data centres and cloud infrastructure; the designation itself does not set a common operator compliance regime. |
| Proposed NIS framework | Would establish operator obligations, regulatory oversight and incident reporting for qualifying data centres. | Set out in the June 2026 Cyber Security and Resilience Bill factsheet. Implementation is described as following Royal Assent through secondary legislation; detailed requirements depend on legislation and subsequent rules. |
Under the framework described in the factsheet, data infrastructure would be a relevant sector and data centres would be treated as an essential service under amended NIS Regulations. Ofcom is identified as the proposed operational regulator. The framework includes risk-management measures, information obligations and reporting of significant incidents, while some information requirements and reporting criteria may be developed through consultation. These are proposed measures in the factsheet, not proof that every duty is already in force.
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The June 2026 factsheet uses rated IT load as the principal threshold measure. It describes the proposed scope as:
- Data centres with a rated IT load of at least 1 MW.
- Enterprise data centres operated solely to meet their owner’s IT needs, at a threshold of at least 10 MW.
These thresholds describe the proposed regulatory scope, not the definition of CNI status. Operators should not assume that CNI designation alone makes a site subject to the same NIS duties as another facility; the proposed rules depend on the legislation, scope and implementing requirements.
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What could data-centre growth mean for electricity, water and planning?
Expansion can support digital services and growing computing needs, including AI, while increasing pressure on land, grid connections, electricity and cooling resources. The House of Commons Library’s 2026 briefing puts UK data-centre capacity at approximately 1.6 GW in 2024. It also summarizes preliminary government analysis suggesting capacity could reach 3.3–6.3 GW by 2030, depending on policy interventions. That range is conditional, not a guaranteed forecast.
The Commons Library briefing discusses planning, electricity consumption, water use, sustainability and resilience as policy concerns. It notes that planning approaches differ across UK nations and that some planning changes discussed apply in England only. Sector-wide demand figures or growth estimates are not evidence that a particular facility is unsustainable: site impacts depend on its location, design, energy supply, cooling system and local circumstances.
For a proposed facility or expansion, the practical questions are whether power and water are available, how the site would withstand physical and climate risks, how it fits local planning rules, and what benefits are established for the location. The cited national sources do not provide a like-for-like comparison of individual operators or sites, so they cannot support ranking companies on resilience or local impact.
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