Due in the 2030s
On the 18th of October 2026, The Telegraph reported that Microsoft had walked away from the anchor tenancy at Nscale's Essex data centre, the site meant to hold Britain's largest AI supercomputer. It had the land, the money, the planning and the chips. It never had the power, and its only customer was never British.
Key · companies amber, places red
The report, by James Titcomb, landed at half past six. Microsoft, the only customer ever announced for Nscale's data centre in Loughton, Essex, had told the company it would pull last year's agreement to rent 23,000 Nvidia chips there. Microsoft did not comment, the Telegraph reported. Nscale said it remains committed to the site and the UK, is exploring other power sources, and that the grid problem has no impact on its other contracts. Read those two sentences together and the strain shows.
The four things
A data centre needs four things: land, power, chips and a customer.
Loughton was announced on the 16th of September 2025 as the UK's largest AI supercomputer: a two-billion-pound campus, 50 megawatts scalable to 90, and about 23,040 Nvidia GB300 chipsConfirmedNscale's own announcement, the 16th of September 2025; its release of the 15th of October repeats about 23,000 from early 2027 to power Microsoft Azure. It sat inside Microsoft's $30bn pledge of UK investment. Nscale bought the land that September; ministers urged the council on. Three of the four had a date on them. Only one had a plug.
Due in the 2030s
In September 2026, the Guardian reported what the grid had told the company: UK Power Networks did not expect to deliver the power until the early to mid-2030sConfirmedThe Guardian, the 24th of September 2026, first reported by Morning Intelligence. The site wants 90 megawatts, about the demand of 315,000 homes. I ran the numbers on the chips alone: at Nvidia's own rack density they draw about 42 megawatts before coolingCalculated23,040 chips at Nvidia's GB300 NVL72 rack density, about 130kW per 72-GPU rack. The 90 was the point.
The queue behind it is long. Ofgem counted 315 data centres waiting to connectConfirmedOfgem, reported by The Guardian, the 24th of September 2026 by June 2026, asking for 73 gigawatts against a national peak of 45. Capital is not scarce tonight. Electrons are.
The tenant in the owner's coat
In March, the Guardian found the site was then a scaffolding yard, and set out the money as it was: a plan, by a UK company, to buy Taiwanese chips and rent them to a US customer. Microsoft told the paper it was not building the supercomputer, only agreeing to be the customer once someone built it.
The ground was British, and so was the company. The capital was American, the chips Taiwanese, the customer American too. Sovereign described the postcode. Not a scandal, then: a tenancy. This week the tenant gave notice.
Interactive · the site inventory
Four things a data centre needs. One has a plug.
Four bays, four lights at once.Land in hand. Chips on order. Power due in the 2030s. Customer: gone.
What the notice costs
Nscale is mid-flight toward a listing. Its prospectus, filed on the 18th of September 2026, reports $103.4bn of contracts, of which $2.6bn is activeConfirmedForm S-1, Nscale, filed the 18th of September 2026. Of 461,000 chips under contract, about 25,000 run; this is not a company that only announces. Anthropic and Microsoft are the two largest customers, at up to $44.6bn and $43.8bn. Reuters reported a flotation near 35 billion dollars. The largest line in the book has just walked.
The market has turned. This month a rival, Firmus, pulled a listing, and CoreWeave's unsecured debt briefly yielded 14.5 per cent. The Norwegian flagship is reported six months late; whether it was fined is contested. A re-rating, not a collapse, at the cruellest moment for a company whose best customer was a promise.
An announcement is not an asset, and a tenant is not an owner. Britain did not lose a supercomputer this week. It lost a tenant, and the light went with it. If you are building something you would rather own outright, email brandon@kreostudio.co.uk.
Readout: what is confirmed, and what is not
- Confirmed, from Nscale's announcement of the 16th of September 2025 and its release of the 15th of October 2025: the Loughton terms (50MW scalable to 90MW; about 23,000 GB300 chips from Q1 2027 to power Microsoft Azure) and the company's own 'fully committed' line.
- Confirmed, from Microsoft's blog of the 16th of September 2025: the $30bn, about £22bn, UK investment, and Nadella's 'UK's largest supercomputer'.
- Confirmed, from The Guardian of the 24th of September 2026: UK Power Networks told Nscale the 90MW could not arrive until the early to mid-2030s; the 90MW equals about 315,000 homes; Ofgem's queue of 315 data centres at 73GW against a 45GW national peak (the queue figure is from June 2026).
- Confirmed, from Nscale's Form S-1 filed the 18th of September 2026: $103.4bn total contract value against $2.6bn active; 461,000 chips contracted against about 25,000 running; Anthropic up to $44.6bn and Microsoft up to $43.8bn.
- Confirmed, from The Guardian of the 9th of March 2026: the site as a scaffolding yard, and the description of the money as a plan by a UK company to buy Taiwanese-made chips and rent them to a US customer. Confirmed, from The Telegraph of the 5th of July 2026: the investment minister wrote to the council urging approval.
- Reported, not confirmed here: the cancellation itself. The Telegraph's report of the 18th of October 2026 is the only original account; Microsoft did not comment, and Nscale confirmed only its commitment, not the exit. Every other outlet credited The Telegraph. The flotation figure of about 35 billion dollars is Reuters' reporting of the 4th of September 2026.
- Contested: the Norway penalties. Bloomberg describes penalties of millions; a source at the project told Datacenter Dynamics that no fines were imposed. I could not confirm either.
- Calculated, by me: about 42 megawatts of chip demand, from 23,040 chips at Nscale's stated count and Nvidia's GB300 NVL72 rack rating of about 130 kilowatts. Arithmetic on published figures, not a metered reading.
- Not confirmed: whether the listing proceeds or at what valuation; whether Loughton finds another tenant; whether the grid date moves. What would change my mind: Microsoft on the record, a signed replacement customer, or a connection date before 2030.
Sources & references
- The Telegraph, Microsoft axes AI deal in setback for UK data centre pioneer, by James Titcomb, the 18th of October 2026. Paywalled; read through the Yahoo Finance syndication. The only original account of the cancellation.
- Nscale, Nscale Contracts Approximately 200,000 NVIDIA GB300 GPUs with Microsoft, the 15th of October 2025, and the UK AI infrastructure announcement of the 16th of September 2025.
- Microsoft, Microsoft invests $30 billion in UK to power AI future, the 16th of September 2025.
- The Guardian, Launch of UK largest AI supercomputer delayed by power supply problems, the 24th of September 2026, and Revealed: UK multibillion AI drive is built on phantom investments, the 9th of March 2026.
- Reuters, Nscale seeks about $3.5 billion pre-IPO funding, the 4th of September 2026, the source of the listing valuation.
- SEC, Form S-1, Nscale Limited, filed the 18th of September 2026.
- Datacenter Dynamics, Nscale Glomfjord data center delayed, the 16th of October 2026, carrying the project source who disputes the penalties.
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From the KREO Journal · kreostudio.co.uk/blog/due-in-the-2030s · published the 18th of October 2026. Corrections are dated, never silent.
