Colocation Facilities in the UK: Market Size, Businesses & Forecast 2026

The colocation facilities industry in the United Kingdom comprises specialized data centers that provision secure floor space, power, cooling, and high-speed network connectivity to corporate tenants and cloud providers who deploy their own IT hardware. Driven by cloud migration and the rapid scaling of high-density artificial intelligence workloads, the industry is expanding significantly from its traditional hubs into regional zones. According to the House of Commons Library (2024), the UK possessed approximately 1.6 gigawatts of operational data center capacity in 2024. Industry estimations compiled by techUK indicate that the data center sector generates an annual gross value added (GVA)

Industry snapshot

Key public data points

Historical & forecast

Get in touch and our analysts will be happy to help with custom market sizing, deeper segmentation, supplier detail or a bespoke study built for you.

What does the Colocation Facilities in the UK industry cover?

The colocation facilities industry involves the provision of physical space, electrical power infrastructure, environmental cooling, and telecommunications cross-connects within multi-tenant data center environments. Operators do not manage the core IT software or end-user applications; instead, they maintain highly resilient physical facilities where third-party enterprises, financial institutions, and hyperscale cloud providers rent space for their computing infrastructure. The industry is defined by high capital intensity and rigorous service-level agreements guaranteeing near-zero unplanned downtime.

• •Facilities offer tiered physical security architectures, multi-source redundant power grids, and backup diesel generation systems.
• •The scope is technically distinguished from managed hosting or cloud software services because the client retains ownership and maintenance duties of the physical servers.
• •Under the United Kingdom Standard Industrial Classification (UK SIC 2007), these business activities are most frequently categorized under Class 63110, covering 'Data processing, hosting and related activities'.

Who operates in the industry and how is it structured?

The UK colocation market is structurally concentrated around major international wholesale and retail operators, alongside specialized national developers. Geographic concentration remains exceptionally high, with the Greater London area and the M4 corridor (specifically Slough) functioning as Europe's largest aggregate data center cluster. However, severe power availability constraints across the national grid are prompting operators to expand their geographic footprints into alternative regional hubs.

• •Greater London and its immediate peripheral zones account for over 80% of the aggregate national data center supply according to CBRE market profiles.
• •Emerging regional hubs are scaling up in South Wales, Bristol, Manchester, and Northumberland to circumvent power delays in the capital.
• •Operators primarily segment their product offerings into wholesale colocation, intended for large-scale cloud hyperscalers, and retail colocation, which serves localized corporate enterprise computing.

What drives demand in the industry?

Industry growth is primarily propelled by the exponential rise of high-density artificial intelligence computing alongside ongoing corporate migrations to public and hybrid cloud environments. Furthermore, stringent enterprise requirements for multi-site disaster recovery and latency-sensitive financial trading systems generate consistent baseline colocation demands. The massive scaling needs of modern software require infrastructure that consumes immense amounts of electricity, transforming power access into a premier driver of commercial site selection.

• •Data centers consume approximately 2.5% of the UK's total electricity supply as reported by the House of Commons Library in 2024.
• •National data center power demand is projected by parliamentary studies to potentially experience a four-fold increase by the year 2030.
• •Hyperscale cloud operators and emerging 'neocloud' platforms act as the primary volume buyers, rapidly absorbing newly constructed wholesale capacity.

Who are the notable companies in the industry?

The competitive environment in the UK features a mix of massive global real estate investment trusts, multinational digital infrastructure conglomerates, and highly capitalized private-equity-backed regional operators. Due to the immense capital expenditure required to establish scale, the upper tier of the market is heavily dominated by well-funded international entities with extensive local corporate subsidiaries. These firms compete fiercely on the basis of power availability, network carrier density, and contract flexibility.

• •Equinix (UK) Limited and Digital Realty Trust (operating locally via brands like Interxion) maintain dominant retail and wholesale footprints in the London Docklands and Slough.
• •Vantage Data Centers UK Limited and Telehouse International Corporation of Europe Limited represent major multinational operators executing multi-megawatt campus expansions.
• •Pure Data Centres Group Limited and Kao Data Limited operate as prominent UK-headquartered developers targeting high-density enterprise and AI workloads.
• •Global investment firms drive the financing landscape, underscored by Blackstone's multi-billion-pound hyperscale data center campus development in Blyth, Northumberland.

What are the recent trends and outlook?

A defining structural trend is the critical transition toward high-density engineering configurations capable of supporting heavy artificial intelligence hardware workloads. Because traditional air-cooling methodologies are proving insufficient for these intense server architectures, the industry is pivoting toward advanced liquid cooling systems and reinforced floor-loading designs. To relieve deployment friction, the UK government is actively intervening through national planning incentives to decentralize digital infrastructure outside traditional metropolitan boundaries.

• •The UK Government has designated specific 'AI Growth Zones' in regions like Teesside, Newcastle, and Wales to incentivize localized data center developments up to 500MW.
• •According to CBRE projections for 2026, London vacancy rates are expected to compress to a record low of 5.9% due to rapid tenant absorption.
• •New facility designs are increasingly mandated to achieve BREEAM 'Excellent' or 'Outstanding' sustainability certifications to comply with corporate environmental goals.

How is the industry regulated?

The regulatory framework governing UK data centers has intensified significantly following their elevation to national security priorities. Operators face strict compliance mandates regarding data residency, carbon emission disclosures, and physical operational resilience. Because data centers are designated as systemic backbones for the broader economy, public authorities have assumed a more direct role in overseeing sector vulnerabilities.

• •In September 2024, the UK Government officially designated data centers as Critical National Infrastructure (CNI), granting operators direct state support during cyberattacks or grid outages.
• •Facilities must align with the UK General Data Protection Regulation (UK GDPR) and the Data Protection Act 2018 to ensure localized, compliant storage of personal citizen records.
• •Operators are subject to the Streamlined Energy and Carbon Reporting (SECR) framework, which enforces mandatory annual disclosures of greenhouse gas emissions and energy efficiency metrics.

Government, statistical and trade sources used for this Claight analysis.

• House of Commons Library Research Briefing 2024 ·
• techUK Data Centres Programme reports 2024 ·
• UK Government Department for Science, Innovation and Technology (DSIT) statements 2024 ·
• Office for National Statistics (ONS) Standard Industrial Classification 2007