Britain is building the ground. It does not own the stack.
Read from the bottom up, the UK's position is strong and getting stronger: real facilities, real power connections, a national supercomputing spine, and a deep queue of committed capital. Read from the top down, it is exposed. The pieces that decide whether any of this compute can actually run — the lithography that makes the chips, the packaging that assembles them, the memory that feeds them — sit entirely offshore, and at three points narrow to a single company with no substitute.
This is the report's one structural conclusion: the UK owns the sites and the sockets, not the silicon.
Nine places the chain narrows to one
| Dependency | What flows | Layer | Substitutability | Source |
|---|---|---|---|---|
| ASML to Intel | EUV lithography systems | semicap to chipmaker | Single-source | Gotrade |
| ASML to Samsung Electronics | EUV lithography systems | semicap to memory | Single-source | Gotrade |
| ASML to TSMC | EUV lithography systems | semicap to foundry | Single-source | TechTimes |
| Bureau of Industry and Security to Nvidia | Export controls govern China-bound AI chips | gov / regulator to chipmaker | Policy lever | source pending |
| Nvidia to CoreWeave | AI accelerators (GPUs) | chipmaker to hyperscaler | Single-supplier dep. | CNBC |
| Nvidia to OpenAI | GPUs and up to $100bn partnership | chipmaker to lab | Concentration / interlock | source pending |
| Nvidia to xAI | Colossus GPUs (555k+ and growing) | chipmaker to lab | Concentration | source pending |
| SK Hynix to Nvidia | High-bandwidth memory (HBM) | memory to chipmaker | Oligopoly · sold out | Introl |
| TSMC to Nvidia | Leading-edge wafer fabrication and CoWoS advanced packaging | foundry to chipmaker | Single-source | INDmoney |
Three of the nine are single-source. ASML is the sole commercial supplier of EUV lithography — no substitute below the 7nm node — and its order book leans on just three buyers. TSMC's CoWoS packaging is the single tightest part of the whole hardware stack, sold out through 2026.
The memory node is an oligopoly running flat out. SK Hynix provides roughly 90% of the HBM Nvidia buys; HBM is the binding constraint on training and inference, sold out across all suppliers through 2026.
The Nvidia-downstream links are a different risk — not scarcity but concentration. Three of the nine carry source pending, shown not hidden: a paid report firms these against a primary before they carry weight.
The chain, layer by layer
A bulge in the middle and a pinch at the top: many clouds, many power players, many labs — but one foundry, one IP licensor, two EDA houses, and a semicap layer that funnels into a single EUV supplier. Competition at the ends; single points of failure in the core.
The four that decide it
Where it lands on British soil
| Facility | Location | Capacity | Status | Note | Source |
|---|---|---|---|---|---|
| Slough cluster | Berkshire | c.1,000 MW (c.675 MW hyperscale) | Operational | Europe's largest datacentre cluster and the UK de facto AI Growth Zone: 30+ operational datacentres totalling c.1GW, c.14,000 jobs, £30m+ annual business rates. Equinix operates the flagship LD4/LD5/LD6/LD7 campus. | Data Centre & Network News (Kao Data) |
| Elsham Wolds | North Lincolnshire | up to 1,000 MW | Permitted | Planning approved March 2026 for what is billed as the UK's largest AI datacentre campus: a 176-hectare former RAF airfield. Phase 1 construction from 2027, opening targeted 2029. | Royal Geographical Society (GOV.UK / PBC Today) |
| Culham AI Growth Zone | Oxfordshire (UKAEA) | 100 to 500 MW | Planned | The first UK AI Growth Zone, confirmed 13 Jan 2025 under the AI Opportunities Action Plan, at the UK Atomic Energy Authority campus. A 400kV connection freed by the JET fusion decommissioning; AWS and CloudHQ reported developing nearby. | Oxford Calling |
| North East AI Growth Zone | Cobalt Park & Blyth | at least 500 MW required | Under constr. | The second UK AI Growth Zone, across two North East sites near Newcastle and in Northumberland. DSIT taskforce launched 25 Sep 2025. Cobalt Park already hosts three colocation datacentres on dedicated National Grid supply. | Computer Weekly |
| Nscale Campus, Loughton | Essex | 50 to 90 MW | Under constr. | The UK's largest AI supercomputer when live (2027): built with Microsoft, housing c.23,040 NVIDIA GB300 GPUs, liquid-cooled. Part of Microsoft's $30bn UK AI push announced 16 Sep 2025. | Nscale |
| Pure / SEGRO, Park Royal | West London | 56 MW | Under constr. | A £1bn, 56MW datacentre — a joint venture between SEGRO and Pure Data Centres formed March 2025, part of the shift of AI capacity into London-edge sites. | W.Media |
| Google Waltham Cross | Hertfordshire | — | Operational | Google's hyperscale datacentre, opened September 2025 — the anchor of a £5bn two-year UK investment spanning cloud, DeepMind research and infrastructure engineering. | W.Media |
| Dawn supercomputer | Cambridge | c.19 petaflops | Operational | The UK's fastest AI supercomputer (Phase 1), operational since November 2023 at the University of Cambridge's Open Zettascale Lab — 1,024 Intel Data Center GPU Max accelerators, built with Intel and Dell. Anchors the national AI Research Resource (AIRR). | University of Cambridge |
| DataVita | Scotland | — | Operational | A Scottish datacentre operator whose capacity underpins CoreWeave's £1.5bn commitment to UK AI compute — part of Scotland's growing role as a focal point for next-generation AI infrastructure. | Data Centre Insight |
The strongest column in the report: c.1 GW operational at Slough alone, c.1 GW permitted at Elsham Wolds, two Growth Zones scaling toward 500 MW each, a national supercomputing spine, capacity from the London edge to Scotland. Real, dated, mostly operational or under construction.
But every site needs the GPUs, packaging and memory from Section 2. The ground is sovereign. What runs on it is not.
The commitment ledger
| Committer | Commitment | Announced | Detail | Provenance |
|---|---|---|---|---|
| Microsoft | $30bn (2025–28) | 16 Sep 2025 | Largest-ever UK commitment; c.$15bn capex incl. the UK's largest supercomputer with Nscale (Loughton). UK–US Technology Prosperity Deal. | source pending |
| Blackstone | £10bn | — | AI campus at Cambois / Blyth, Northumberland; within the North East AI Growth Zone. | programme-level |
| Amazon (AWS) | £8bn (2024–28) | — | UK datacentre fleet expansion; a steady programme rather than a single flagship site. | programme-level |
| Alphabet / Google | £5bn (2 yr) | — | Cloud, DeepMind research and datacentre capacity; anchored by Waltham Cross (opened Sep 2025). | date not vs primary |
| Nvidia | £2bn + c.60k GPUs | 16 Sep 2025 | To catalyse UK AI startups; the largest single Nvidia deployment in the country. Tech Prosperity Deal. | source pending |
| CoreWeave | £1.5bn | — | UK AI compute anchored on DataVita capacity in Scotland. | source pending |
£26.5bn in GBP-denominated commitments, plus Microsoft's $30bn (2025–28). Shown separately and not converted, because an FX-blended total would be a manufactured figure — and this report doesn't manufacture figures.
Two of the six are pinned to a hard date; the other four are programme-level, not yet firmed to a primary. Here they carry their provenance state on their face. Firming them is the first item any paying version clears.
What the map means
Britain has bought the ground and is wiring the sockets. On this dataset the UK's physical AI build-out is genuine, large and accelerating. On the layer the country can own — land, grid, planning, sites — the position is strong.
The exposure sits one layer up, and it is concentrated. Every site depends on hardware whose critical nodes are entirely offshore and, at three points, single-source: ASML's EUV lithography, TSMC's CoWoS packaging, SK Hynix's HBM. None has a domestic substitute; two are sold out through 2026. The UK's lever is not industrial but diplomatic — the export-control regime (BIS, Commerce).
Why this sits inside The Quernal's question. The infrastructure on this map is the physical answer to what happens when we don't have to work — the compute that automates the work is built on it. Who controls that compute, and where it pinches, is who sets the pace and terms of that change. Offered as analysis, not a settled house verdict; the sourcing above is where a reader checks our working.
Every figure is drawn from The Quernal's AI-ecosystem dataset (65 entities across 15 layers; the dependency graph and its 9 chokepoints; 9 UK facilities; the commitment ledger). Each carries the real date it was recorded and a separate date for the fact it describes. There is no proprietary composite: the substitutability classifications are The Quernal's labelled reading of the sourced facts beside them — the inversion of the market convention of all-scores-are-composites-methodology-in-appendix.
Where a commitment is recorded at programme level and not yet firmed against a primary source, it is marked in crimson. This is a dated snapshot as of 5 July 2026, not a live tracker. No scraped sources; enrichment only from legitimately public and licensed material. No synthetic inputs — no modelled, composite or simulated attitudes are used, quoted, or counted anywhere.
Conflict of interest. Anthropic — whose models write The Quernal — appears on this map as a model lab and in the surrounding capital flows. This is the deepest conflict on the map and is disclosed wherever the AI-lab stack is named. (Drill any COI-flagged company for the specific disclosure.)