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In 2025, the UK is one of Europe’s main hubs for data centers, hosting some of the largest and most powerful facilities on the continent. These data centers are essential for running cloud services, AI applications, finance platforms, and other digital operations. With data demand growing rapidly, size and capacity have become critical measures of influence in the sector. This article looks at the five biggest data centers in the UK, based on power consumption, physical size, and server count, to give a clear picture of the country’s digital backbone.

Why the UK Is a Hotspot for Data Centers

The UK offers a mix of technical, geographical, and regulatory advantages that make it a prime location for large-scale data centers. London, in particular, is one of the most connected cities in the world, with access to major transatlantic cables and dense peering points like LINX. The country also has a mature digital economy, strong demand from sectors like finance, government, and tech, and an established ecosystem of cloud and colocation providers. Even post-Brexit, the UK remains attractive due to stable regulations, ongoing investment in green infrastructure, and its role as a gateway between Europe and North America.

Ranking Criteria

The data centers listed in this article are ranked using three key metrics: total power consumption (in megawatts), total surface area (in square meters), and estimated number of servers. These factors offer the most accurate picture of operational scale and capacity. Where exact figures aren’t publicly available, industry estimates and provider disclosures have been used. Only standalone or campus-style facilities operating in the UK as of 2025 are considered.

Top 5 Largest Data Centers in the UK in 2025

1. VIRTUS London5 – Slough

VIRTUS London5 is currently the UK’s largest data center by footprint and power capacity, covering around 50,000 square meters with an estimated power availability of 90 megawatts. Located in Slough, a key digital hub just west of London, the facility supports a diverse client base including major cloud providers and enterprises requiring low-latency access to London’s financial district. It operates on a modular design that allows rapid expansion without compromising uptime.

VIRTUS emphasizes sustainability, holding BREEAM Excellent certification and investing in energy-efficient cooling systems to reduce environmental impact. The data center’s infrastructure supports upwards of 100,000 servers, making it one of the highest-density facilities in Europe. Detailed insights on its scale and operations can be found through VIRTUS’ official resources.

2. Telehouse North Two – London Docklands

Telehouse North Two is one of the flagship data centers in London’s Docklands, covering roughly 24,000 square meters and delivering about 73 megawatts of power capacity. It is strategically located near one of the world’s busiest internet exchange points, LINX (London Internet Exchange), enabling unparalleled network connectivity and low latency, especially for financial services and telecom clients. The facility features robust physical security and redundancy systems designed for continuous uptime.

Owned by Telehouse, part of the Japanese company KDDI, the data center is known for its high-density server deployments and scalable infrastructure. Recent expansions have increased its footprint and power to meet rising demand. Additional technical specifications and client use cases are available through KDDI’s official data center information.

3. Ark Data Centres – Cody Park, Farnborough

Ark Data Centres’ Cody Park campus in Farnborough is among the UK’s largest data center sites, with over 45,000 square meters of space and power capacity exceeding 70 megawatts. The facility is designed with modular scalability and military-grade security, catering to government, enterprise, and cloud providers that require high availability and compliance standards.

Cody Park is recognized for its focus on sustainability, operating under a clear carbon neutrality roadmap supported by renewable energy sourcing and advanced cooling technology. Its infrastructure supports tens of thousands of high-density servers, with flexibility for future expansion. For a comprehensive overview of the site’s features and sustainability efforts, Ark Data Centres’ official resources offer detailed information.

4. Amazon Web Services (AWS) – London Region

AWS does not operate a single data center but rather a network of availability zones (AZs) across London and the South East, collectively making it one of the largest data infrastructure footprints in the UK. While exact figures remain undisclosed, estimates suggest AWS’s London region consumes over 100 megawatts of power, supporting hundreds of thousands of servers to meet dynamic cloud workloads. The region is critical for public sector clients, startups, and enterprises relying on AWS’s elasticity and global reach.

AWS continues to expand capacity with a strong focus on renewable energy and sustainability commitments, aiming for 100% renewable energy usage in its global infrastructure. Detailed insights on AWS’s UK operations and green initiatives can be found through the official Amazon Web Services sustainability page.

5. Global Switch – London East

Global Switch’s London East facility spans over 26,000 square meters and provides between 40 to 50 megawatts of power capacity. Positioned strategically to serve enterprise clients requiring hybrid cloud and colocation services, it is part of Global Switch’s wider international network of hyperscale data centers. The site features advanced infrastructure designed for high availability and scalability, with strong focus on connectivity and physical security. Its location benefits from proximity to key network hubs, supporting low-latency access across Europe.

Global Switch has also committed to sustainable operations, investing in energy-efficient technologies and aiming to reduce its carbon footprint. Further technical details and sustainability practices are outlined on Global Switch’s official site.

To better understand the scale and capabilities of these facilities, the table below compares the five largest UK data centers across their key metrics—surface area, power consumption, and server count—alongside notable features such as sustainability efforts and strategic advantages.

Comparative Overview of the UK’s Largest Data Centers

Data Center	Location	Operator	Surface Area (m²)	Power Consumption (MW)	Estimated Servers	Sustainability / Certifications	Key Features / Notes
VIRTUS London5	Slough	VIRTUS	~50,000	~90	100,000+	BREEAM Excellent	Modular design, high-density, green cooling
Telehouse North Two	London Docklands	Telehouse (KDDI)	~24,000	73	High-density servers	Robust redundancy, physical security	Close to LINX, financial & telecom focus
Ark Data Centres – Cody Park	Farnborough	Ark Data Centres	45,000+	70+	Tens of thousands	Carbon neutral roadmap, renewables	Military-grade security, government & enterprise
AWS London Region	London & South East	Amazon Web Services	Multiple sites	>100 (estimate)	Hundreds of thousands	Committed to 100% renewable energy	Elastic cloud infrastructure, public sector focus
Global Switch – London East	London East	Global Switch	26,000+	40–50	Not publicly disclosed	Energy-efficient tech investments	Hybrid cloud focus, strong connectivity

Trends & Future Outlook

The demand for data capacity in the UK continues to rise sharply, driven by AI, cloud computing, fintech, and emerging technologies like 5G and edge computing. This growth fuels ongoing expansions at existing data centers and the development of new facilities, especially in secondary cities such as Manchester and Birmingham.

Sustainability is increasingly shaping data center design, with operators committing to carbon neutrality and investing in renewable energy and efficient cooling methods. The shift towards data center-as-a-service (DCaaS) models reflects changing client needs for flexibility and scalability. Overall, the UK’s data center landscape in 2025 is defined by rapid growth, green innovation, and strategic geographic diversification.

Conclusion

The UK’s largest data centers in 2025 reflect the country’s position as a key digital infrastructure hub in Europe. These facilities combine immense scale, cutting-edge technology, and increasing sustainability efforts to meet the growing demand from cloud services, finance, and emerging tech sectors. As data consumption continues to surge, investments in expansion, energy efficiency, and strategic locations will shape the future landscape. Understanding these major data centers provides insight into the foundation supporting the UK’s digital economy today and in the years ahead.

Sources Used:

• – Official site

• (KDDI) – Data center information

• – Official site

• – UK Sustainability page

• – Official site

• – Network exchange point

• Industry insights summarized from