700 Stirling Road
Slough, UK

London III

CyrusOne London III is a brand new purpose built state-of-the art data center offering cloud providers, systems integrators and multinational corporations customised, secure and resilient data center solutions within a key business hub.

Strategically located in Slough, one of the UK’s premier data centre locations, the facility will ultimately deliver 3,600 sq m (38,750 sq ft) of world-class technical space with an IT load of 9 MW, with each data suite customised to individual client specifications.

CyrusOne Data Center
700 Stirling Road, Slough SL1 4ST
United Kingdom

London III – Highlights

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


  • 3,600 sq m (38,750 sq ft) of technical space within one building on two floors
  • 9 MW IT load to the facility
  • Highly resilient, concurrently maintainable power and cooling to Tier III
  • Dedicated electrical plant to each floor
  • Ultra-low PUE through the use of Indirect Adiabatic Air Cooling
  • 1,400 mm return air plenum with 3,400 mm clear height in the data hall
  • Active / Active dual redundant power supplies of 15 MVA
  • Carrier neutrality and diverse fibre connectivity to active A+B Meet Me Rooms from multiple providers
  • Secure managed delivery bay with 3 tonne goods lift
  • Multi-layer industry leading levels of physical and electronic security with 24/7 year round onsite support

  •  N+1 Indirect Adiabatic Air Cooled solution as standard
  • Ultra-low PUE due to cooling solution and optimum operating conditions as standard
  • Cooling infrastructure individually managed and linked to BMS
  • Independently regulated temperature and humidity
  • A+B Power Supplies to cooling equipment for full redundancy (local ATS’s)

  • Three stage fire detection systems into data halls and UPS plant areas
  • VESDA (Very Early Smoke Detection Apparatus) in data halls and UPS plant rooms for early warning
  • Fire detection in all rooms, ceiling return air plenums 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
  • 4.5 MW distributed redundant topology with 4 independent and compartmentalised blocks
  • 99.999% reliability with the ability for concurrent maintainability
  • IT power supplies are derived from primary and reserve feedsfrom each block via STS’s creating a meshed IT distribution topology between all 4 blocks
  • Distributed redundant UPS topology with 10-minute battery back-up as standard two UPS systems per block
  • Fully rated distributed redundant LV back-up generators with48-hour fuel autonomy, capable of continuous running
  • Re-fuelling contracts to ensure timely replacement


  • 3 metre high secure perimeter fence to CPNI base specification
  • External CCTV and Geoquip trembler wire to fence
  • Vehicle lock to site entrance and delivery bay with PAS68 rated gates to protect from vehicle attack
  • 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 if required

  • Air cooled UPS modules
  • Sequence and variable mode UPS modules, dedicated to each tenant / hall
  • Dedicated main plant for each customer
  • Integrated A&B MV Infrastructure along with distributed LV generators for increased resilience
  • Phasing to allow for subtle changes in each hall / tenant specification / requirements
  • Remote intelligence control algorithms to remove reliance on central BMS

  • Regional Water Stress: The London area currently faces high water stress, which is projected to continue in the future.
Water Risk and Use Now 2030 Projection 2040 Projection
Regional Water Stress High High High

(Risk assessment and projections based on WRI Aqueduct Tool)

  • Regional Grid Greenhouse Gases: How much greenhouse gas does this facility’s local electrical grid emit while generating electricity? (Useful for Location-based greenhouse gas reporting)
Greenhouse Gases 2004 2008 2014 2018
MTCO2/MWh 0.497 0.497 0.412 0.278

The carbon-intensity of United Kingdom’s grid has improved about 3.1% points per year over the last 14 years of published data. (2004-1014 data from European Environment Agency, 2018 data from “The European Power Sector in 2018“)

  • Regional Grid Renewables: What percentage of this facility’s local electrical grid is from renewable sources (wind, solar, biomass, hydro, and geothermal)?
Grid Renewables 2004 2008 2012 2016
Percent from renewable sources 3.6% 5.6% 11.3% 24.5%

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

  • Other Features: Onsite electric vehicle charging points