Site: Colt London 3 Welwyn Garden City

Company: Colt Data Centre Services
Metro: London
Country: England
Country: United Kingdom
Region: Europe
Address: 20 Black Fan Road, Welwyn Garden City AL7 1QA, UK
Gross SqFt: 134,549
Total Power: 25.6 Megawatts
PUE: 1.21

The London, Welwyn Garden City data centre has over 12,500m2 of secure and flexible space.

London, Welwyn Garden City is a carrier neutral facility situated just 35 minutes train journey north of London’s Kings Cross station.


  • Total power provision 33MVA
    • Substation 1 - 25MVA/132 kV
    • Substation 2 - 8MVA/11kV
  • Centralised, dedicated N+N UPS to each data hall
  • Range of power densities 1000-3000W/m2
  • N+1 or N+N generators provisioned per data hall
  • 10 minutes battery autonomy


  • Onsite security 24/7, multiple guards
  • High security perimeter fence
  • Photo badge card access system
  • Car trap
  • Mantrap access to data halls
  • Central alarm monitoring with optional cabinet monitoring
  • Full CCTV coverage
  • Secure tenant areas available for equipment delivery storage and/or cabinet build/test area
  • ISO 27001 certification


20 Black Fan Road, Welwyn Garden City AL7 1QA, UK

SITES within 15 miles of Colt London 3 Welwyn Garden City

Distance Site name SqFt MW
0.0 miles INAP North London 1.00
11.04 miles Gyron Centro
11.13 miles Gryon Campus - Hemel Hempstead 107,600
11.3 miles Gyron Maylands
11.59 miles VIRTUS London1 Enfield 68,458 4.20
13.64 miles Kao London One Campus 160,000 8.80