Data centres in London
Europe's largest data centre market, the established Docklands cluster plus West London (Park Royal, Hayes), now constrained by grid capacity, pushing demand outward.
Indicative estimates · public sources
The London data centre market
London is Europe's largest data centre market, built on two clusters: the Docklands and East London exchanges that anchor financial connectivity, and the West London corridor through Park Royal, Hayes and the Slough fringe that took most of the hyperscale build. Grid capacity in West London is now the constraint, so new demand is spilling into outer boroughs, the M4 corridor and regional hubs. The London Docklands cluster, anchored by Telehouse London and the London Internet Exchange (LINX), remains the dense colocation and interconnection core, while West London hosts large hyperscale data centre campuses and new data halls. The capital remains Europe's primary digital infrastructure hub.
27 known data centres in London
Full directoryKnown existing facilities in the London market, compiled from public operator records. Capacity is shown where the operator has published it.
Global Switch London East
OperatingLondon, United Kingdom
Colt London 4
Under constructionLondon, United Kingdom
VIRTUS LONDON5 Stockley Park
OperatingLondon, United Kingdom
Telehouse South
OperatingLondon, United Kingdom
CyrusOne LON4
OperatingLondon, United Kingdom
CyrusOne LON5
OperatingLondon, United Kingdom
CyrusOne LON2
OperatingLondon, United Kingdom
CyrusOne LON1
OperatingLondon, United Kingdom
CyrusOne LON3
OperatingLondon, United Kingdom
Equinix LD8
OperatingLondon, United Kingdom
Telehouse North London
OperatingLondon, United Kingdom
VIRTUS LONDON1 Enfield
OperatingLondon, United Kingdom
Interxion LON1 London
OperatingLondon, United Kingdom
Digital Realty London LHR18
OperatingLondon, United Kingdom
Digital Realty London LHR19
OperatingLondon, United Kingdom
Digital Realty London LHR20
OperatingLondon, United Kingdom
Digital Realty London LON2
OperatingLondon, United Kingdom
Digital Realty London LON3
OperatingLondon, United Kingdom
NTT London 1
OperatingLondon, United Kingdom
Colt London City
OperatingLondon, United Kingdom
Colt London North
OperatingLondon, United Kingdom
Colt London West
OperatingLondon, United Kingdom
Telehouse North Two
OperatingLondon, United Kingdom
Telehouse West
OperatingLondon, United Kingdom
CyrusOne LON6
PlannedLondon, United Kingdom
iomart Central London (DC2)
OperatingLondon, United Kingdom
iomart North London (DC12)
OperatingLondon, United Kingdom
What limits new data centre capacity in London
Grid connection timing, transmission headroom and cooling-water access are usually the real constraints on new London capacity, not land.
Connection capacity, not land, is the binding limit in West London. In 2022 the Greater London Authority warned that parts of Hillingdon, Ealing and Hounslow could wait until the early 2030s for major new grid connections after data centre load absorbed the available headroom. The NESO connections reform is reordering the queue toward shovel-ready projects. Cooling-water availability and Thames Water capacity add a second constraint on large new sites.
Indicative · compiled from public sources
The London data centre pipeline
Planning, grid and tender activity in Greater London, by build stage, tracked from public records. Review site records and sources through private intelligence access.
Type, region and capacity band only. Review site records and sources through private intelligence access.
Operators in London
Data centres in London, answered
How many data centres are in London?
Data Centre Axis tracks 27 known existing data centres in London in its public directory; 6 of them publish operating IT capacity, totalling about 92 MW. Planning and grid-stage projects in London are followed directly from public records: contact the team to review data for a specific site or local requirement.
What types of data centre are in London?
The London market spans colocation facilities, wholesale and hyperscale data centres, and a growing set of AI-ready sites built for high power density measured in megawatts. The mix of digital infrastructure and the available power differ site by site.
What is the largest data centre in London?
Among the facilities in our directory that publish operating IT capacity, VIRTUS LONDON5 Stockley Park operated by VIRTUS Data Centres is the largest, at about 24 MW. Facilities that do not publish capacity, and planned capacity, are not ranked.
Which operators run data centres in London?
Operators with public-record presence in the London market include Digital Realty (UK), VIRTUS Data Centres, Equinix (UK), NTT (UK). See the operators directory for the full list and each operator's footprint.
How do I find, lease or buy data centre capacity in London?
To secure data centre capacity or land in London, submit your target IT load, site power, schedule and technical constraints. Requirements are reviewed against our research records for London, which cross-reference colocation facilities, planning applications, grid connections, water access and fibre routes. Where candidate sites or facilities match your brief, Data Centre Axis provides the underlying evidence and arranges introductions directly with the operator or site owner once both parties agree.
Source or assess a site in London.
Apply for private access for market signals and candidate-site data, or discuss a focused manual sourcing review.
Verified 12 July 2026. London market figures are indicative estimates compiled from public sources; scope and source notes are in the methodology.