Microsoft Walks From Loughton After the Grid Says No

Microsoft has left Nscale’s planned Loughton data centre after UK Power Networks pointed to a 2030s grid wait, as the British AI cloud company prepares a $3 billion IPO.

Nscale says its other Microsoft contracts still stand. The Essex plot, which the UK government in 2025 called the country’s largest sovereign AI data centre, now has planning permission, a cleared yard, and no named tenant.

Loughton Had Planning, a Tenant and No Plug

Nscale pledged £2 billion for a campus on a former scaffolding yard in Loughton, Essex, and aimed to open in 2027. The design started near 50 megawatts of compute and scaled toward 90 megawatts, a cluster sized for about 23,040 Nvidia GB300 processors.

WHAT LOUGHTON HAD ON PAPER

• The money: A £2 billion build pledged for the site Britain billed as its sovereign AI flagship.
• The customer: Microsoft as the announced anchor, with a supercomputer to fund on the plot.
• The permit: Planning permission in place, and the scaffolding yard already stripped.
• The socket: Up to 90 megawatts requested from UK Power Networks, the local distributor.
• The grid date: A 2027 opening that the same operator has now pushed toward the early to mid-2030s.

In July, Nscale was told the connection would miss 2027, and it began looking at making electricity on the plot, including fuel cells, while it hunted other UK sites. By late September the wait had a decade-shaped outline, after UK Power Networks indicated that enough power would not be there until the early to mid-2030s. Microsoft then ended its Loughton role. Microsoft declined to comment.

Nscale said the Microsoft relationship remains strong and long-term, that a London-wide grid issue does not touch other contracts, and that it is still committed to Loughton and to Britain. The company is still shopping for other power and other UK land. What it no longer has at this address is an announced occupier.

Britain’s Grid Queue Now Decides Who Builds

The party that broke the tenancy sits on the other side of the meter. Loughton had a customer, a permit, and a cheque. It did not have a dated path for 90 megawatts of firm power, a load often compared with the use of about 315,000 homes.

THE WAIT FOR BRITISH ELECTRONS

• Data-centre queue: About 73 gigawatts across around 315 projects, as identified by Ofgem, versus peak demand for the whole country of about 45 gigawatts.
• Old generation queue: More than 700 gigawatts of generation and storage sat in the pre-reform pipeline, with waits of up to 10 years, NESO said.
• Loughton’s ask: Up to 90 megawatts from UK Power Networks for a 2027 start that has slipped into the 2030s.
• New applications: Transmission connections have been paused to new requests since June 30, 2025.

NESO, the National Energy System Operator, says the old first-come system left shovel-ready plants waiting up to 10 years in a queue that had grown to over 700GW of generation and storage, about four times what Britain says it needs by 2030. That 700 gigawatt stack is not the same list as Ofgem’s 73 gigawatts of data-centre demand. Both are jammed. National Grid said it was working with NESO and local operators to speed connections where it could. UK Power Networks has not discussed the Loughton file in public.

Reforms now try to pick projects that are ready to build, which does not by itself pour copper into Essex this decade. Britain can still publish an AI strategy that names a yard in Loughton. It cannot, on this site, say when the electrons arrive. The scarce input is not a GPU count on a letter of intent. It is megawatts that actually show up at the fence.

How Much of Nscale’s $103 Billion Book Is Live?

Nscale’s September 18, 2026 filing for a New York listing under the ticker NSCL showed, as of August 31, $103.4 billion of active and contracted TCV and only $2.6 billion of that already active. Microsoft and Anthropic account for about 85% of the book. Only 25,000 of 461,000 contracted GPUs were running.

NSCALE CONTRACT BOOK AT AUGUST 31, 2026

Those Microsoft and Anthropic figures are “up to” caps, and the filing does not split TCV name by name. Contract terms start when GPU clusters are delivered, so a signed ceiling is not a cash receipt. Around the filing, live running capacity was put at 55 megawatts, a different number from the 1.37 gigawatts of active and contracted capacity in the S-1. Nscale also listed five sites already on and twelve still in the pipeline, with a weighted average contract life of about 5.7 years.

For the six months ended June 30, 2026, revenue was $140.6 million, up 1,252% from $10.4 million a year earlier. The net loss was $1,020.1 million. The largest customer supplied 52% of that first-half revenue, which is the live concentration, distinct from the 85% share of the signed book.

Anthropic’s four services agreements, signed August 25, 2026, provide for payments of up to $44.6 billion for dedicated Nvidia Vera Rubin NVL72 capacity at the Monarch campus in Mason County, West Virginia, in four tranches. Nscale must use best efforts to raise the money to build it. As of the prospectus date, it had not obtained binding commitments for that financing. If a tranche lands late, Anthropic can end that slice without paying.

Microsoft’s statements of work, signed between September 2025 and April 2026, provide for payments of up to $43.8 billion through December 2033 if delivery and availability tests are met. Add the two caps and you get $88.4 billion, which is why the two names are treated as about 85% of the $103.4 billion book. Together they are what a public buyer is being asked to underwrite.

The Microsoft Book Still Runs Through 2033

Loughton was the UK shop window. The Microsoft file still includes Portugal and Norway. The same filing says the 200 megawatt SIN02 site at Sines, Portugal, will take more than 66,000 Vera Rubin NVL72 GPUs for Microsoft from late 2027. Microsoft is also a customer at Nscale’s Narvik campus in Norway.

Nscale is asking public buyers to hold a clean line: one unpowered British building does not unwind $43.8 billion of take-or-pay paper running to 2033. Microsoft just showed it will leave a site that cannot switch on. The open question for the listing is how many other delivery dates in that stack look like Loughton once the power, the hall, and the chips have to arrive together.

West Virginia Bought Its Own Power

On March 16, 2026, Nscale said it had signed a letter of intent to provide Microsoft with 1.35 gigawatts of AI compute capacity at Monarch, after buying AIPCorp and a campus with a state-certified microgrid that Nscale said could scale above eight gigawatts. Caterpillar G3500 natural gas sets were meant to put two gigawatts on the site by the first half of 2028, without leaning on the local utility. McKinsey has put 156 GW of AI data center demand by 2030.

Microsoft’s datacenter approach is to build the best global infrastructure informed by near-term and long-term demand. Our investments blend owned datacenters, leased facilities, and strategic collaborations.

Jon Tinter, President, Business Development and Ventures, Microsoft, Nscale press release, March 16, 2026

The S-1 now places Anthropic, not Microsoft, in the Monarch contract stack. Microsoft’s remaining named build sits in the 2033 statements of work, including Portugal. Monarch tried to buy electrons with gas sets and a microgrid. Loughton joined a queue. One campus still has a tenant on paper. The other, as of October 18, 2026, does not.

Norway Is Six Months Behind, With 6.4 Megawatts Live

As of mid-October, Nscale’s Glomfjord site in Norway was six months behind schedule. Only 6.4 megawatts of a planned 30 megawatts was running, after cooling leaks, construction slips, and a transformer fire. That is a live plant, not a slide. It is also a reminder that signed megawatts still have to be built in weather, with inspectors, and with cooling that holds.

NVE, Norway’s water and energy directorate, has a waste-heat analysis due by mid-November for the separate Kvandal plant near Narvik, which holds 230 megawatts of grid capacity with room to 290. Nscale started building before that legally required study was in. A coercive fine is on the table if the paper misses November 15, 2026.

FROM FLAGSHIP ANNOUNCEMENT TO EMPTY TENANCY

1. 2025: The UK government names Loughton the country’s largest sovereign AI data centre.
2. March 16, 2026: Nscale announces a Microsoft letter of intent for 1.35 gigawatts at Monarch in West Virginia.
3. August 25, 2026: Anthropic signs four agreements worth up to $44.6 billion at Monarch.
4. September 18, 2026: Nscale files its S-1 for a New York listing under NSCL.
5. September 24, 2026: UK Power Networks’ 2030s wait for Loughton becomes public.
6. September 25, 2026: Nscale announces $3.36 billion of convertible notes, with $2.36 billion closed.
7. October 9, 2026: Firmus, another Nvidia-backed AI data-centre firm, abandons an Australian listing after investors refuse a valuation near $30 billion.
8. October 18, 2026: Microsoft ends its Loughton tenancy.

CoreWeave shares fell almost 25% in the week of October 12, 2026, as the specialist AI cloud builders, often called neoclouds, watched borrowed build-outs meet a colder tape. Nscale is still trying to raise as much as $3 billion in the IPO as soon as October 2026. A $1 billion Nvidia convertible piece is due around mid-November. Loughton is what happens when the megawatts miss the calendar and the anchor tenant has somewhere else to go.

The scaffolding yard in Essex is already clear and the tenant is gone, while UK Power Networks has not brought the 2030s date forward, so the New York filing has to live with that socket.

Disclaimer: This article is news reporting and analysis for information only. It is not investment advice, a solicitation to buy or sell Nscale, Microsoft, Anthropic, Nvidia, or CoreWeave securities, or a forecast of any IPO, contract, or power connection. Readers should consult a qualified financial adviser before acting on listing plans, take-or-pay caps, or data-centre schedules. Figures and statuses reflect the company filing, operator comments, and public statements as of the article’s date and may change.