Ark Data Centres (UK): Elstree Data Center 6

Elstree Data Center 6, part of the Ark Elstree campus in Hertsmere just north of London, is one of multiple buildings in a large-scale data center campus initiative. The broader Elstree campus will deliver up to 250 MVA of power from 2028 across multiple facilities, positioning it as one of the largest data center hubs serving the London market. 

Proximity to the A41 and M25 ensures strong connectivity to London and cross-UK networking routes.  The campus is designed for modular growth and high-density workloads, supporting Ark’s vision of future-proof infrastructure and sustainable operations. 

⚙️ Facility Highlights

• Modular and scalable architecture designed for incremental build-out as demand grows. 
• Cooling approach includes direct air cooling, indirect air cooling, and liquid cooling options, depending on workload and efficiency trade-offs. 
• Precision cooling designs aim for low PUE and high thermal efficiency in support of dense compute loads. 
• Recyclable steel modular construction is emphasized in design to reduce waste and environmental impact. 
• The campus will support major capacity (multi-hundreds of MVA) to meet hyperscale and AI workloads. 
• Hybrid colocation: cross-connects to cloud providers on-site and relationships with fiber partners to guarantee low-latency interconnectivity. 

🔐 Security & Compliance

• Layered physical security measures built into the campus design (perimeter, controlled access). 
• 24/7 monitoring and surveillance systems across the campus. 
• Ark offers managed security services (e.g. vulnerability scanning, MDR) as part of its product suite. 
• Compliance regimes: Ark is ISO-certified in several domains (e.g. ISO 27001, ISO 22301, ISO 14001, etc.). 
• Use of strict access control, dual authentication, and monitored systems across sites. 

🌐 Connectivity & Carrier Access

• Carrier-neutral design: customers can select among multiple connectivity providers. 
• Onsite cross-connects to cloud providers to reduce latency and simplify hybrid or multi-cloud architectures. 
• Strong relationships with fiber infrastructure providers to ensure resilient network paths.
• Integration with Ark’s broader interconnection ecosystem across the UK to provide high-performing paths and network options. 

💼 Who It Serves

• Hyperscale cloud providers and large tech firms requiring high-capacity, scalable infrastructure
• Enterprises expanding into the London market with needs for colocation, interconnect, and cloud access
• Companies running AI / HPC / GPU workloads that demand efficient cooling and power density
• Telecommunications and content delivery networks needing low-latency access to the London core
• Organizations demanding compliance, security, and sustainability features