Ark Data Centres (UK): Longcross Park 1

Longcross Park is Ark Data Centres’ flagship modular, AI-ready data centre campus in Surrey, United Kingdom, located on Chobham Lane, Longcross, in the Enterprise M3 zone. The campus is being developed with sustainability and high performance in mind—combining advanced cooling, low-carbon energy solutions, and modular scalability to serve next-generation workloads. 

Positioned close to London and within a major business corridor, Longcross Park benefits from excellent connectivity to fiber routes, cloud facilities, and network ecosystems. The facility is designed to support demanding AI and compute workloads, which is underlined by Ark’s collaboration with Nebius to deploy thousands of NVIDIA GPUs on site. 

⚙️ Facility Highlights

• Total compute / development capacity: 54 MW across the campus (two data centres) 
• Liquid-ready and air cooling systems designed for efficiency and high densities 
• Target PUE (Power Usage Effectiveness) of sub-1.3 
• Use of low-NOx gas generators and renewable / green energy strategies
• Modular, prefabricated architecture for rapid deployment and expansion 
• Hydrogen-ready design to support future energy transition initiatives 
• On-site generation and resilient power infrastructure to support high availability 

🔐 Security & Compliance

• Although specific certification details are not confirmed in the sources I found, Ark positions the campus for high-security, enterprise-grade operations, and OCOLO lists ISO 27001, ISO 22301, ISO 9001, ISO 14001, ISO 50001 compliances for Longcross Park. 
• 24/7 operations and surveillance assumed (standard for Ark’s data centre model)
• Physical security layers and controlled access (common practice in Ark’s design approach)

🌐 Connectivity & Carrier Access

• Carrier-neutral environment with multiple fiber and connectivity options (as part of Ark’s network ecosystem) 
• Cross-connects to on-campus and off-campus cloud providers and network partners 
• Low-latency links to surrounding markets and cloud hubs
• Support for AI / GPU tenants (via Nebius) leveraging direct high-density interconnects

💼 Who It Serves

• AI infrastructure providers seeking high-density compute and cooling
• Cloud operators and hyperscalers requiring modular, scalable deployment
• Enterprises and research institutions with demanding workloads (ML/AI, HPC)
• Telecom and network operators needing flexible colocation with strong interconnect
• Organizations aiming for sustainable, future-proof infrastructure aligned with ESG goals