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London still dominates Britain's datacenter map, but the regions are powering up
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London still holds about two-thirds of the UK’s datacenter capacity, but multi-megawatt projects are accumulating outside the M25 corridor.
Engineers evaluating where to place workloads now have more alternatives to the capital, which can ease pressure on London’s constrained grid and planning regime. Regional sites, however, may bring new challenges such as limited power availability, fewer skilled staff, and longer supply-chain lead times. Recognizing where growth is occurring helps with capacity planning, risk assessment, and cost modelling for future expansions.
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London accounts for roughly 40 % of facilities and about 1,048 MW of the UK’s ~1.6 GW datacenter capacity.
Outside London, the South East, Wales and the North East show the largest pipelines of new multi-megawatt builds.
Some regional proposals, such as the Devon campus or Blackstone’s Blyth site, target hundreds of megawatts but depend on power access and planning approvals.
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What the cluster adds up to.
The analysis shows that London continues to dominate the UK datacenter landscape, with 219 active facilities representing about 40 % of the total site count and roughly 1,048 MW of IT capacity, which is two-thirds of the national total. This concentration has historically been driven by proximity to financial markets, fiber-optic routes to North America, and established power infrastructure. Despite this dominance, the data indicates a noticeable shift as developers look beyond the capital for new builds.
Outside the M25 orbital motorway, the South East hosts 62 facilities delivering 128 MW and has ten planned developments, making it the second-largest expansion queue. Wales follows with 32 sites contributing 154 MW, the second-highest capacity after London. The North East currently has 21 sites at 17 MW, but notable projects are in the pipeline, including a Blackstone-backed facility near Blyth that could reach 720 MW and an OpenAI Stargate site at Cobalt Park that is presently on hold due to energy-cost concerns.
For engineers, the emergence of regional capacity means workloads can be placed closer to end-users in the Midlands, the North, or Wales, potentially reducing latency and easing reliance on London’s strained power grid. However, building or expanding in these areas may require grid upgrades, transport of heavy equipment, and recruitment of specialist staff, all of which add to project cost and schedule risk. The availability of renewable power and local planning policies will heavily influence feasibility.
Growth may stall where regional infrastructure cannot support the power demands of large-scale campuses; the article notes that some proposed projects, such as the Devon data campus claiming 1.5 GW of AI-optimized compute, remain controversial and uncertain. Similarly, projects like OpenAI’s Stargate are delayed because of perceived energy-cost barriers in the UK. Engineers must therefore weigh the benefits of geographic diversification against the practical limits of power supply, planning approvals, and operational readiness in each region.
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