LON-3 Data Center

London

LON-3 data center

25 MW of AI-ready infrastructure across 5,200 square meters in London's premier Slough data center corridor - Opening 2026

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Iron Mountain London LON-3 data center

Strategically positioned in the highly interconnected Slough data center corridor just west of the M25, Iron Mountain's LON-3 delivers 25 MW of AI-ready critical IT capacity across six GPU-ready data halls totaling 5,200 square meters (55,972 square feet). This three-story, highly secure facility will open later in 2026. Whether you're a hyperscale cloud provider, enterprise, or government agency, LON-3 provides the space, power, security, and compliance standards your organization demands. This carrier-neutral colocation facility offers connectivity to the LINX exchange and dark fiber access to hundreds of networks, clouds, and service providers.

  • 25 MW
    Critical IT capacity
  • 5,200
    square meters (55,972 square feet) data center space
  • 100+
    Network service providers accessible
  • 2026
    Phased opening

Why leading enterprises choose our London data center (LON-3)

LON-3 data center overviewCarrier neutral background

  • Size: 5,200 square meters (55,972 square feet) of colocation space in a three-story facility on a secure 2.5-acre campus in the Slough data center corridor
  • 6 x 870 square meter data halls (~4.1 MW per hall)
  • Power: 25 MW of total critical IT capacity with GPU-ready power configurations
  • Infrastructure: AI and hyperscale cloud ready infrastructure with BREEAM green building certification
  • Deployment Options: Flexible colocation solutions for hyperscale, enterprise, and government workloads
  • Campus: Secure 2.5-acre site in Slough Trading Estate, part of LON-1, LON-2, LON-3 campus
  • Cooling: Flexible air and liquid cooling designs for high-density AI/ML workloads
  • Uptime: 99.999% uptime SLA with redundant power and cooling systems
  • Availability: 2026 opening allowing strategic deployment planning and scaling
  • Matched by 100% renewable energy
  • Security: Biometric access control systems with 24/7/365 on-site security and operations staff, multi-layer perimeter security, and CCTV surveillance with recording
  • Smart Hands: Technical support services by experienced on-site professionals for equipment monitoring and maintenance
  • Migration: Professional equipment deployment, installation coordination, and migration services for seamless transitions
  • AI/ML Services: Pure AI/ML hosting and flexible hybrid AI deployment options with GPU-ready infrastructure
  • Support: Customer portal access for service requests, account management, and 24/7 technical assistance
  • Facilities: Shared work areas, meeting spaces, and professional amenities for customer convenience
  • Service area: London, England; United Kingdom; EMEA region and beyond
  • Distance: 2.5 km west of Slough town center; approximately 30 km from central London
  • Airport: 12 km from London Heathrow Airport
  • Location: Slough Trading Estate, Berkshire at the heart of the densely interconnected Slough data center corridor
  • Strategic position west of the M25 motorway with excellent transport connectivity for colocation in London
  • Access via M4 and M25 motorways for rapid connectivity across the UK and Europe
  • Gateway to EMEA connectivity serving as an ideal data center location outside central London
  • Proximity to London's major business and financial districts
  • Adjacent to major European fiber routes and network infrastructure
  • Access to a highly skilled technical workforce across the Greater London region
  • Address: 111 Buckingham Avenue Slough, SL1 4PF, UK
Network Infrastructure:
  • LINX On-Site: Direct on-premises peering with London Internet Exchange (LINX)
  • Carrier-Neutral Facility: 15 on-site carrier providers with access to every tier 1 global and regional carrier
  • Diverse Entry Points: Multiple diverse fiber points of entry for maximum redundancy and resilience
  • Fiber Infrastructure: Dark fiber access to 100+ network service providers, cloud platforms, and IT service providers via the Slough data hub
  • Network-Rich Environment: Low-to-no latency access on major backbones with connectivity throughout the densely interconnected Slough corridor
  • Cloud-Neutral: Open access to every leading cloud provider and service platform
Network Services:
  • Cloud On-Ramps: In-house access to 20+ SDNs and cloud on-ramps for seamless hybrid cloud connectivity
  • Cross Connects: 16,000+ existing cross-connects across Iron Mountain's global footprint; 1,300+ customers available for potential interconnection
  • Internet Exchanges: Connectivity to 14 Internet Exchanges for optimized routing and peering
  • Global Reach: Part of Iron Mountain's interconnected global footprint covering three continents and 21 markets
  • Metro Connectivity: Campus-wide connections across LON-1, LON-2, and LON-3 facilities on Slough Trading Estate
  • Private Network Transport: Point-to-point connectivity options between Iron Mountain data centers (Campus | Metro | National | International)

The industry's most comprehensive compliance program meeting the most stringent regulatory and industry standards

Global Standards (ISO Certifications):
  • ISO 27001 (Information Security Management)
  • ISO 9001 (Quality Management Systems)
  • ISO 14001 (Environmental Management)
  • ISO 22301 (Business Continuity Management)
  • ISO 50001 (Energy Management Systems)
  • ISO 14064 (Greenhouse Gas Accounting and Verification)
Industry Standards:
  • SOC 1 Type II certification for service organization controls
  • SOC 2 Type II certification for trust services criteria
  • PCI-DSS compliant infrastructure for payment card industry data security
Sustainability Certifications:
  • BREEAM green building certification for sustainable construction
  • Dedicated renewables contracts (solar, tidal) to improve hour-by-hour clean energy (24/7 Carbon Free Energy)

Want to learn more? Contact a data center team member today!

 
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Iron Mountain Data Centers serves over 1,300 customers worldwide, including 95% of the Fortune 1000. Our London data center facility hosts enterprises across financial services, technology, healthcare, and media industries who rely on our carrier-neutral platform for their most critical infrastructure needs. Experience the same trusted partnership that has made Iron Mountain the preferred choice for highly regulated organizations requiring uncompromising security, compliance, and connectivity.

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Frequently asked questions

What makes LON-3 unique compared to other London data centers?

LON-3 combines 25 MW of AI-ready infrastructure with strategic positioning in the Slough data center corridor, offering exceptional connectivity through the LINX exchange and dark fiber access to 100+ providers. The facility features comprehensive compliance certifications, 100% renewable energy, and BREEAM green building standards, backed by Iron Mountain's 75 years of security expertise.

What other data center facilities does Iron Mountain have in the United Kingdom?

Iron Mountain operates multiple data centers across the UK, including LON-1 and LON-2 data centers on the same Slough Trading Estate campus as LON-3. Our UK data centres portfolio provides comprehensive colocation in London and throughout the United Kingdom. To explore our complete portfolio of UK data centres locations and colocation services, visit ironmountain.com/en-gb/data-centers.

What is the total capacity and size of LON-3?

LON-3 provides 25 megawatts of critical IT capacity across 5,200 square meters (55,972 square feet) of data center space. The 2.5-acre campus features a three-story building with six data halls, all designed to support both CPU and GPU workloads with AI-ready power and cooling infrastructure.

What security and compliance measures are in place at LON-3?

LON-3 maintains the industry's most comprehensive compliance program, including ISO 9001, ISO 14001, ISO 22301, ISO 27001, ISO 50001, ISO 14064, SOC 1, SOC 2, HITRUST, PCI-DSS, and BREEAM certifications. Physical security includes 24/7/365 on-site staff, biometric access controls, CCTV surveillance, and multi-layer perimeter security, all backed by Iron Mountain's seven decades of experience protecting confidential data.

When will LON-3 be available for customer deployments?

LON-3 is scheduled for phased opening later in 2026, with data halls becoming available soon. This staged approach allows customers to plan their deployments strategically and scale infrastructure as their requirements grow.

How can I learn more about Iron Mountain's data center locations in the UK?

Visit our UK data centers page at https://www.ironmountain.com/en-gb/data-centers to explore our complete portfolio of facilities across the United Kingdom, including specifications, services, connectivity options, and UK colocation pricing for each location. Our team can provide detailed information about UK colocation options and alternative data centers outside of London to meet your specific requirements.

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