London Data Center Market
London data center market: capacity, vacancy, UK power pricing, National Grid interconnect queue, and Slough/West London cluster build pipeline.
Location: Europe, United Kingdom.
Market Metrics
- Operational capacity: 1,100 MW
- Under construction: 350 MW
- Facilities tracked: 99
- Vacancy rate: 3.2%
- Year-over-year absorption: 120 MW
- Average power cost: $0.14 per kWh
- Interconnection wait: 36 months
- Utility: UK Power Networks
Grid Constraints
West London grid capacity constrained; new developments shifting to East London and outer boroughs
Behind-the-Meter Activity
UK net-zero commitments driving hydrogen-ready generator procurement and on-site solar where feasible.
Tracked Facilities
- Global Switch London East — London (40 MW)
- Equinix LD4 — Slough (20 MW)
- Equinix LD8 - London, Docklands — London (5 MW)
- Digital Realty London LHR19 — London (5 MW)
- Level(3) London (Braham Street) — London (5 MW)
- Digital Realty London LON1-3 — London (5 MW)
- Global Switch London North — London (5 MW)
- Global Switch London East — London (5 MW)
- Digital Realty London LHR21 (closed) — London (5 MW)
- COLT DC London — London (5 MW)
- Digital Realty London LHR20 — London (5 MW)
- Redcentric London Data Centre — London (5 MW)
- Pulsant Maidenhead SE-2 — Maidenhead (5 MW)
- London Hosting Centre — London (5 MW)
- Digital Realty London LHR17 — West Drayton, Middlesex (5 MW)
Powering a Project in This Market
Where the interconnection queue sets the schedule, on-site generation is the alternative that can be delivered in months. The Power Intelligence Tool compares fuel cells, aeroderivative gas turbines, reciprocating gas engines, diesel generators, and solar plus storage on twenty-year cost and time to power. Equipment sits in the marketplace — gas turbines, generators, transformers, and switchgear — with four-tier price context in the Pricing Index and acquisition capital through equipment financing.
Sourcing
Market figures above are stored values from the SecondWatt data center dataset, as of 2025-06-30, sourced from CBRE EMEA Data Centre Report 2025. Collection and refresh rules are documented on the methodology page. Other markets and operators are indexed in the data center library, and published analysis in articles and reports.