Slough Trading Estate
Slough, UK


Strategically located in Slough, one of the UK’s premier data center locations, CyrusOne London I delivers 9.3MW of IT power to 4,330 sq m (46,608 sq ft) of world-class technical space.

The facility is purpose-built, offering industry- leading energy efficiencies, the latest Indirect Adiabitic Cooling technology, uniquely low PUEs, multilayer security and carrier neutrality with diverse routes and Tier lll+ level of resilience.

CyrusOne Data Center
12 Liverpool Road Slough, Berkshire SL1 4QZ
United Kingdom

London I – Highlights

  • Overview
  • Power
  • Cooling
  • Security
  • Fire Protection
  • Amenities
  • Connectivity

Exterior daylight photo of the front entrance of the London I datacenter.

  • Active/Active dual redundant power supplies of 15MVA
  • Fully flexible solutions with IT power of 2,000W/sq m (186W/sq ft) and higher if required
  • Highly resilient, concurrently maintainable power and colling to Tier lll+
  • Carrier neutrality and diverse fiber connectivity
  • 4,330 sq m (46,608 sq ft) of technical space within one building on two floors
  • Onsite electric vehicle charging points
  • Dedicated UPS plant to each data hall
  • Ultra-low PUE through the use of Indirect Adiabatic Air Cooling Rainwater recovery
  • 1,400 mm return air plenum with 4,400 mm clear height in the data hall
  • Secure managed delivery bay with 3-tonne goods lifts
  • Floor loading 10kN per sq m
  • Multilayer industry leading levels of physical and electronic security
  • 24/7 year round onsite support

Photo of CyrusOne London I cooling system.

  • N+1 adiabatic cooling plant, dedicated to each hall
  • Modular cooling infrastructure individually managed and linked to BMS
  • Dedicated Pressurisation AHU’s at N+1 to each hall
  • Independently regulated temperature and humidity to each space

Photo of CyrusOne London I Fire extinguishing system.

  • Data halls and critical A&B plant rooms are constructed from one hour fire rated enclosures to create separate fire zones
  • Three stage fire detection systems into data halls and UPS plant areas
  • VESDA (Very Early Smoke Detection Apparatus)
  • Fire detection in all rooms and in voids as required
  • Gas suppression to data halls and UPS rooms with dedicated bottles
  • Double knock approach gas suppression to all areas, single zone activation
  • Fire detection and suppression systems interconnected to central BMS
  • Mains power supplied via 100%-rated A&B 33 kV incomers diversely routed Active / Active with a capacity of 15 MVA
  • All IT power metered and charged as consumed at dedicated MV and LV meters
  • N+N power solutions dedicated to each hall, with separate UPS strings
  • Minimum N+N UPS with 10-minute battery back-up as standard
  • Fully rated N+1 MV back-up generators with 48-hour fuel autonomy at full load, capable of continuous running
  • Refueling contracts to ensure timely replacement

Photo of CyrusOne London I power supply.

  • 3 metre high secure perimeter fence
  •  External CCTV and Geoquip trembler wire to fence
  • Vehicle lock to site entrance with dual gates and rising bollards
  •  24/7 year round on-site security located in secure control room
  • Extensive CCTV and access control throughout the facility
  • Progressive layers of security to restrict access through the site
  • Mantraps with biometric readers into data halls can be provided if required

Photo of CyrusOne London I security fence.

  • Power and building monitoring systems to provide alarms
  • Power surge management
  • Dedicated 24/7 year round facilities management team
  • 24/7 year round on-site M&E engineers undertaking Planned Preventative Maintenance (PPM) programmes
  • Real-time monitoring of electrical and mechanical systems

  • Carrier neutral access via diverse active A+B Meet Me Rooms to multiple telecommunication providers including Zayo, Cogent Communications, euNetworks, CenturyLink.
  • BT, Virgin Media, Colt, KCOM, SSE Telecoms, Vodafone, Verizon and GTT telecommunication providers are also within 100 meters of the facility with potential for quick deployment.
  • IBM Cloud on-ramp available onsite
  • Megaport point of presence available onsite providing network access to services without a cloud on-ramp
  • Strict cable management policy

  • CyrusOne Zero Water Consumption Cooling: No water is consumed to cool this facility (such as water towers or evaporative cooling). Minimal amounts of water are used for humidification and facility maintenance. This facility uses highly efficient chillers, variable frequency drives, and energy-efficient CRAH units to achieve high efficiency air-cooled chilling.
  • Regional Water Stress: The London area currently faces high water stress, which is projected to continue in the future. Unlike many other data centers, CyrusOne’s London I facility does not use water for cooling and is therefore insulated from this regional water risk, both current and future.
Water Risk and Use Now 2030 Projection 2040 Projection
Regional Water Stress High High High
CyrusOne Water Use Zero Consumption Zero Consumption Zero Consumption

(Risk assessment and projections based on WRI Aqueduct Tool)

  • 100% Renewable Power: CyrusOne’s London I data center is powered by a 100% renewable energy tariff, including customer power.
Greenhouse Gases 2004 2008 2014 2018
Regional Grid MTCO2/MWh 0.497 0.497 0.412 0.278

CyrusOne London I – 100% Renewable = Zero Carbon Emissions

(2004-1014 data from European Environment Agency, 2018 data from “The European Power Sector in 2018”)

Grid Renewables 2004 2008 2012 2016
Regional Grid Percent from renewable sources 3.6% 5.6% 11.3% 24.5%

CyrusOne London I – 100% Renewable 

This has been increasing about 1.7% points per year over the last 12 years of published data. (Data from the European Environment Agency.)

(Data from the European Environment Agency.)

  • Other Features: Onsite electric vehicle charging points