Colt London North Data Centre
Welwyn Garden City, Hertfordshire, United Kingdom
Source: OpenStreetMap
Colt London North Data Centre is a mapped data center in Hertfordshire, United Kingdom, operated by Colt Data Centre Services. DataCentersExposed has documented a 195,749 sq ft footprint and 1 environmental-permit record at this site. It runs on United Kingdom's grid, which was 36% fossil-fuelled at 217 gCO₂e/kWh in 2025 (Ember).
Reporting by Eric Keller · Updated Jun 14, 2026
Most sites are mapped — located but awaiting a second source. How we verify
Dot size = disclosed capacity (MW). Smallest = undisclosed, not small.
Overview
source: linkColt London North Data Centre is a mapped data center in Welwyn Garden City, United Kingdom, run by Colt Data Centre Services. Available records put its footprint at 195,749 square feet. Ownership above Colt Data Centre Services is not disclosed in the facts on hand.
Operator chain
- Ultimate parentColt Data Centre Services
- Files asColt Data Centre Services
- This facilityColt London North Data Centre
The grid behind this site
source: Ember · EurostatNational grid context, not this facility's own metering. Full country picture: United Kingdom data centers.
In the news
source: Google News (local + English)- Colt DCS to Expand Data Centre Capacity at London CampusData Centre Magazine· Nov 6, 2025
- Iver landfill data centre subject of legal action by campaignersBBC· Aug 21, 2025
- Dalkia extends long-term partnership with Colt Data Centre Servicesfmj.co.uk· Aug 7, 2025
- CapitaLand buys Digital Realty data center in London, UKData Center Dynamics· Aug 17, 2023
- Digital Realty Sells 11 Data Centers to Ascendas Reit for $672mDgtl Infra· Mar 17, 2021
- Colt's London 3 data centre: inside the belly of the modular beastTechRadar· Jul 23, 2014
Environmental permits
source: Permit register- COLT DATA CENTRE SERVICES UK LIMITEDEPR/KP3139DWEPR permit · holder "COLT DATA CENTRE SERVICES UK LIMITED" · Welwyn Hatfield area of responsibility, after 1 April 2012 · Combustion; Any Fuel =>50MW - 1.1 A(1) a) · within ~2 km of the mapped site