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Data Centre Axis
Greater London · market

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.

27
facilities in the directory
92 MW
operating IT capacity published by 6 of 27 facilities
Docklands & West London
primary sub-region

Indicative estimates · public sources

Market context

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 directory

Known existing facilities in the London market, compiled from public operator records. Capacity is shown where the operator has published it.

Global Switch London East

Operating

London, United Kingdom

Global Switch 87 MW

Colt London 4

Under construction

London, United Kingdom

Colt DCS 31 MW

VIRTUS LONDON5 Stockley Park

Operating

London, United Kingdom

VIRTUS Data Centres 24 MW

Telehouse South

Operating

London, United Kingdom

Telehouse 18 MW

CyrusOne LON4

Operating

London, United Kingdom

CyrusOne 18 MW

CyrusOne LON5

Operating

London, United Kingdom

CyrusOne 18 MW

CyrusOne LON2

Operating

London, United Kingdom

CyrusOne 14 MW

CyrusOne LON1

Operating

London, United Kingdom

CyrusOne 9 MW

CyrusOne LON3

Operating

London, United Kingdom

CyrusOne 9 MW

Equinix LD8

Operating

London, United Kingdom

Equinix

Telehouse North London

Operating

London, United Kingdom

Telehouse

VIRTUS LONDON1 Enfield

Operating

London, United Kingdom

VIRTUS Data Centres

Interxion LON1 London

Operating

London, United Kingdom

Digital Realty

Digital Realty London LHR18

Operating

London, United Kingdom

Digital Realty

Digital Realty London LHR19

Operating

London, United Kingdom

Digital Realty

Digital Realty London LHR20

Operating

London, United Kingdom

Digital Realty

Digital Realty London LON2

Operating

London, United Kingdom

Digital Realty

Digital Realty London LON3

Operating

London, United Kingdom

Digital Realty

NTT London 1

Operating

London, United Kingdom

NTT

Colt London City

Operating

London, United Kingdom

Colt DCS

Colt London North

Operating

London, United Kingdom

Colt DCS

Colt London West

Operating

London, United Kingdom

Colt DCS

Telehouse North Two

Operating

London, United Kingdom

Telehouse

Telehouse West

Operating

London, United Kingdom

Telehouse

CyrusOne LON6

Planned

London, United Kingdom

CyrusOne

iomart Central London (DC2)

Operating

London, United Kingdom

iomart

iomart North London (DC12)

Operating

London, United Kingdom

iomart
Power · grid · water

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.

Enquire about capacity
By signal type1 tracked
Planning
1
Planning Greater London · GB
50–100 MW

Type, region and capacity band only. Review site records and sources through private intelligence access.

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.