Data Centre Capacity
Data Centre Capacity in the UK
The UK data centre market is one of the most constrained in the world. Demand is growing, supply is limited, and the organisations that secure the right capacity early are the ones that stay ahead. Armason works with enterprise organisations to source 1MW+ data centre capacity across the UK — structured, matched, and delivered on your timeline.
The UK Data Centre Market
The UK is Europe’s largest data centre market, and London alone accounts for approximately 80% of the country’s total installed capacity. In 2026, the market is characterised by record take-up, record-low vacancy, and power constraints that are reshaping where and how infrastructure can be built.
Enterprise take-up in London is forecast to exceed 189MW in 2026 — the fifth consecutive year in which demand has outpaced new supply. Vacancy is projected to fall to a historic low of 5.9% by year end. For organisations that need capacity, the message is clear: available space is diminishing, lead times are extending, and the window to secure the right infrastructure is narrowing.
Outside London, secondary markets are accelerating. Manchester, Birmingham, Edinburgh, and sites across the AI Growth Zones in Teesside, North Wales, and Oxfordshire are attracting significant new development — driven partly by power availability and partly by enterprise demand for geographic diversification.
UK Market at a Glance
~1.6GW
Total UK installed data centre capacity in 2024
5.9%
Projected London vacancy rate by end 2026 — historic low
189MW
Forecast London take-up in 2026 — 5th year demand exceeds supply
4+ years
Average grid connection wait time in primary UK markets
Sources: CBRE UK Data Centres Outlook 2026, JLL Global Data Center Outlook 2026, Computer Weekly.
Why Sourcing Data Centre Capacity in the UK Is Getting Harder
The UK data centre market has fundamentally changed in the last three years. What was once a relatively straightforward sourcing exercise — identify operators, request proposals, negotiate terms — is now materially more complex.
Power is the primary constraint. Grid connection timelines in primary UK markets now exceed four years on average. This means that capacity which hasn’t already been secured is either not yet built, not yet powered, or already spoken for by the time you’re looking for it.
Supply is being absorbed before it’s built. In London, almost all new capacity expected in 2026 will be accounted for before it reaches the market. Pre-leasing is standard practice. Organisations that wait until they need capacity to start looking are already behind.
The market is fragmented and opaque. True availability — what’s actually available, at what power, on what timeline — is not publicly visible. The gap between what operators publish and what they can genuinely deliver is significant.
What This Means for Enterprise Buyers
For enterprise organisations sourcing 1MW+ of data centre capacity in the UK, the market conditions in 2026 require a different approach to procurement than they did even two years ago.
Reactive sourcing — starting the process when you need the capacity — is no longer viable in most primary markets. The lead times don’t accommodate it. Organisations that secure the right capacity do so by engaging earlier, with more structure, and with better market intelligence than their competitors.
This is where Armason operates. We work with enterprise buyers to structure requirements precisely, access the operator market before it’s fully visible publicly, and coordinate procurement to deliver infrastructure on the business timeline — not the market’s.
For AI and HPC workloads, enterprise compute, regulated environments, and high-growth technology platforms — the process is the same. Structure first, then access.
UK Data Centre Markets
Where capacity exists and what's driving availability.
London
Europe’s largest data centre market. Vacancy at historic lows, power constrained in West London, new supply moving east and beyond the M25. Still the primary market for most enterprise requirements — but available capacity must be secured well ahead of need.
Manchester
The UK’s primary alternative to London. Growing operator presence, more accessible grid positions than the South East, and increasing enterprise demand driven by latency requirements and regional data sovereignty preferences.
Birmingham
Emerging as a credible alternative for Midlands-based enterprise requirements. Lower competition for capacity than London, improving operator infrastructure, and strong connectivity to the national network.
Scotland & Wales
Growing interest driven by renewable energy availability, lower land costs, and AI Growth Zone designations. Suitable for operators and enterprise buyers where latency allows geographic flexibility.
How Armason Sources UK Data Centre Capacity
Armason operates as a neutral intermediary across the UK data centre market — working with enterprise organisations to structure requirements and access operator capacity that isn’t always visible through standard procurement channels.
We don’t represent specific operators or hold preferred supplier arrangements that would bias the matching process. Every engagement is assessed on fit, capability, timing, and commercial alignment. That neutrality is what makes the model work for both sides — and it’s why operators share real availability with us rather than the market-facing positions they publish.
For enterprise buyers, this means access to a more accurate picture of what’s available in the UK market, engagement with operators who can genuinely deliver on your specification, and a structured process that compresses timelines rather than extending them.
What We Need From You
To start the process, we need a high-level brief covering:
Capacity requirement — how much power do you need, and what workload are you running? For AI and HPC requirements, cooling specification matters early. For standard enterprise compute, power and resilience grade are the primary inputs.
Location — is this London-specific, or are secondary UK markets viable? Geographic flexibility significantly increases the number of credible options available to you.
Timeline — when do you need the capacity to be operational? This determines which operators and which assets are in scope. Live capacity and pipeline capacity have very different commercial dynamics.
Commercial parameters — term length, budget framework, and any specific compliance or regulatory requirements that will constrain the operator set.
From that brief, we build a structured engagement and come back with real options — not a list of every operator in the market.
Sourcing Data Centre Capacity in the UK?
Tell us what you need and we’ll arrange a call to discuss the UK market, what’s available, and how we can help you secure the right capacity on the right timeline.