> ## Content Index > Fetch the complete content index at: https://www.sotkn.com/llms.txt > Use this file to discover other available public pages before exploring further. # Microsoft drops 23,000-GPU Essex site as UK power slips to 2030s - URL: https://www.sotkn.com/catalyst/microsoft-nscale-loughton-23000-gpu-essex-grid-2030s/ - Published: 2026-10-18T11:27:49.000Z - Updated: 2026-10-18T11:27:49.000Z - Description: Microsoft has reportedly walked away from renting 23,000 Nvidia GPUs at Nscale's Loughton site after grid power slipped to the 2030s, so in Britain the connection date, not the chips or the tenant, now decides whether an AI hall gets built. - Author: Sean - Tags: #desk-catalyst, #step-power Stack step Stack layer Power Status Tightening Market UK Event date 18 Oct 2026 Confidence Reported (Microsoft has not commented) Microsoft has reportedly walked away from renting 23,000 Nvidia GPUs at Nscale's planned Loughton data centre in Essex after the local grid operator said full power would not arrive until the 2030s, which shows that in Britain the grid connection date, not the chips or the tenant, now decides whether an AI hall gets built. ## What happened? - **The report:** On 18 October 2026 The Telegraph reported that Microsoft had recently told Nscale it was pulling out of its agreement at Loughton, east of London. Microsoft was the anchor tenant and the site's only announced customer, renting about 23,000 Nvidia AI chips. The paper gave no reason for the decision. Microsoft did not comment. - **Nscale's answer:** A spokesman said Nscale remains committed to Loughton and the UK, is exploring alternative power sources for the site and other UK expansion sites, and called it "this unfortunate London-wide grid issue" that has "no impact on our other contracts" with Microsoft. - **The original plan:** When the deal was announced on 16 September 2025, Nscale said Loughton would deliver 50 MW of AI capacity, scalable to 90 MW, and initially house 23,040 Nvidia GB300 GPUs delivered in the first quarter of 2027\. It was billed as the UK's largest AI supercomputer and formed part of Microsoft's UK investment pledge. - **The power problem:** In late September the Guardian, following the newsletter Morning Intelligence, reported that UK Power Networks, the local distribution operator, had told Nscale the grid could not supply enough power until the early to mid-2030s. UK Power Networks would not discuss the project but said many data centres connecting to its network are waiting for works on the national transmission network. ## Why does it matter? **The direct signal.** A hyperscaler had a signed tenant, a named site and a GPU count, and still let the site go once the power date moved out by years. The chips were never the constraint. The step that failed was the one between a planning consent and a live hall: a grid connection big enough to run 50 MW to 90 MW of GPUs. **The second-order signal: a missing tenant now costs a place in the queue.** Britain's energy regulator Ofgem is changing how data centres hold grid capacity. In a consultation published on 29 July 2026, it proposed: - a data centre commitment fee of £237,500 to £712,500 per megawatt, paid when a project accepts a connection offer, refunded at energisation and forfeited if the project leaves the queue early; - queue milestones under which a project must show a credible end-user, orders for long-lead electrical equipment such as switchgear, and the money and skills to build. Our arithmetic: at 90 MW the fee range would be about £21 million to £64 million; at 50 MW, about £12 million to £36 million. The consultation closed on 17 September and Ofgem lists it as awaiting a decision, so none of this applies yet. But if the milestones are adopted as proposed, losing the only named customer is exactly the evidence a site would need to keep its place. A cancelled anchor tenant could turn into a weaker queue position, not just a lost lease. **Why the queue is so long.** Ofgem says contracted demand offers rose from 41 GW to 125 GW between November 2024 and June 2025, driven largely by data centres, and its consultation counts around 73 GW of data centre demand waiting to connect. The Guardian set that against a peak demand of about 45 GW for the whole country. Loughton's 90 MW is small in that queue, which is the point: even a mid-sized AI hall near London waits on the same transmission works as everything else. **Why neoclouds care.** Nscale's prospectus, filed on 18 September 2026, lists grid connection delays and capacity constraints among its build risks. It also says Microsoft's statements of work, worth up to about $43.8 billion through December 2033, depend on Nscale meeting delivery and availability requirements. Our arithmetic: that is about 42% of the $103.4 billion of contracts the filing counts, close to the Telegraph's "more than 40%". The Telegraph says Loughton was believed to be a small part of the Microsoft total, and the filing does not break it out. We covered the delivery-date problem at Nscale's Norwegian site in [Saturday's Wire on Glomfjord](https://www.sotkn.com/wire/nscale-glomfjord-data-center-six-months-late-35b-ipo-wire/); Loughton is the same lesson one step earlier, before any hall exists. ## What does it change? **Near term (to the end of 2026)** - **The 23,040 GPUs need another home or another buyer.** Loughton was about 39% of the up to 58,640 Nvidia GPUs Nscale said in 2025 it would deploy across the UK (our arithmetic). Whether those GB300s were ordered for this site, moved, or never committed is not public. If Nscale finds on-site power, the timeline is its own; if it does not, the UK loses its largest announced AI cluster for now. - **Microsoft's capacity moves to where the power is.** Two days before the report, NiSource said Microsoft had signed for about 1,100 MW in Indiana from 2028, which we covered in the [NiSource Wire](https://www.sotkn.com/wire/nisource-microsoft-1100-mw-indiana-data-center-power-wire/). Nscale's own filing lists more than 66,000 Nvidia Vera Rubin GPUs for Microsoft at Sines in Portugal from late 2027\. A hyperscaler can shop for power across countries; a site cannot. - **UK AI capacity gets thinner.** OpenAI withdrew from Nscale's Stargate UK in April 2026, according to the same filing. With Loughton's anchor gone too, the two largest UK projects in the September 2025 package have both lost their named user. **Longer term (2027 and after)** - **Power-first sites win the lease.** A lease on a site without a firm energisation date is now easy for a big tenant to walk away from; we explain why rent only starts when power does in [Data Center Leases Explained](https://www.sotkn.com/explained/data-center-lease-explained/). Expect UK hall developers to lead with a connection date, or with on-site generation, before they name a tenant. - **The regulator's rules decide who stays in line.** If Ofgem adopts the fee and milestones, sites with a real end-user and paid-up equipment move up; sites that lose their tenant pay to wait or drop out. That is the same pressure we tracked in Malaysia, where operators are now [billed for booked power they do not use](https://www.sotkn.com/markets/malaysia/malaysia-data-centre-unused-power-charge-october-2026/). - **What we cannot see yet:** the contract clause Microsoft used, whether any penalty or fee changed hands, and whether Nscale has a replacement tenant. None of it is in the public record today. | Metric | Value | Source name | Date | | -------------------------------------- | ------------------------------------------ | ----------------------------------------- | ----------- | | GPUs Microsoft was to rent at Loughton | about 23,000 Nvidia AI chips | The Telegraph | 18 Oct 2026 | | Planned capacity | 50 MW, scalable to 90 MW | Nscale press release | 16 Sep 2025 | | Planned first GPUs | 23,040 GB300, first quarter 2027 | Nscale press release | 16 Sep 2025 | | Grid power available | early to mid-2030s | The Guardian, citing Morning Intelligence | 24 Sep 2026 | | Microsoft statements of work | up to about $43.8 billion through Dec 2033 | Nscale Form S-1 | 18 Sep 2026 | | Total signed contracts | $103.4 billion | Nscale Form S-1 | 18 Sep 2026 | | Proposed data centre commitment fee | £237,500 to £712,500 per MW | Ofgem consultation | 29 Jul 2026 | | Fee at 90 MW | about £21 million to £64 million | Our arithmetic | 18 Oct 2026 | | Data centre demand in the queue | around 73 GW | Ofgem consultation | 29 Jul 2026 | ## What should we watch next? - **Microsoft's fiscal first-quarter results, 28 October 2026, after the US close; call at 2:30 pm Pacific time (05:30 Singapore time on 29 October).** The first chance for Microsoft to say whether it is still adding third-party capacity at the same pace, and where. - **Nvidia's US$1 billion subscription for Nscale notes or shares, due to close on or around 16 November 2026, per the prospectus.** A close on schedule says Nscale's biggest supplier is still writing cheques after Loughton. - **An amended Nscale prospectus.** A material change in a customer contract would usually be disclosed there; watch whether the $103.4 billion figure or the Microsoft total changes. - **Ofgem's final decision on the commitment fee and milestones.** No date is set; it decides what a site without a tenant must pay to keep its place. - **What would weaken the catalyst:** Nscale naming a replacement tenant or an on-site power plan with a dated energisation; or Microsoft confirming that the capacity simply moved to another Nscale site in the UK, which would make this a site swap rather than a lost UK cluster. ## Also on the tape - **16 Oct:** Anthropic is offering Blackstone funds a 10% coupon on a US$9 billion junior slice of its planned US$60 billion Project North Star financing for about 1.5 GW of Google TPUs (Financial Times, via Investing.com). - **16 Oct:** NiSource signed a 20-year agreement with Microsoft adding about 1,100 MW of Indiana data center power from 2028 (NiSource). - **16 Oct:** San Francisco's mayor signed a 45-day citywide pause on new data center development while planners study power, water and community effects (The San Francisco Standard). ## FAQ **Why did Microsoft pull out of Loughton?** The Telegraph did not give a reason and Microsoft did not comment. The documented problem is power: the site was due to open in 2027, and the grid operator reportedly told Nscale full supply would not be ready until the early to mid-2030s. **How big was the Loughton deal for Nscale?** Nscale has not said. The Telegraph reported the UK deal was believed to be a small part of Microsoft's contracts, which the prospectus puts at up to about $43.8 billion, and Nscale says its other Microsoft contracts are unaffected. **Why can't the UK connect a 90 MW data centre sooner?** Local distribution networks can often reach a site, but large loads also need upgrades on the national transmission network. Ofgem says data centres alone account for around 73 GW of demand in the connection queue. **Does this change the rules for other UK data centres?** Not yet. Ofgem's proposed commitment fee and milestones are still awaiting a decision. If adopted, a site would need a credible end-user to hold its place, which makes losing a tenant more costly. **Takeaway:** In Britain the grid connection date now decides whether an AI hall gets a tenant, and Loughton is the first big site to lose one over it. ## References 1. [The Telegraph, "Microsoft axes AI deal in setback for UK data centre pioneer"](https://www.telegraph.co.uk/business/2026/10/18/microsoft-axes-ai-deal-setback-uk-data-centre-pioneer/?ref=sotkn.com), 18 Oct 2026\. Microsoft's withdrawal, the 23,000 chips, the 2030s power date, Nscale's statement and the more than 40% Microsoft share. 2. [Nscale, "Nscale announces UK AI infrastructure commitment in partnership with Microsoft, NVIDIA and OpenAI"](https://www.nscale.com/press-releases/nscale-uk-ai-infrastructure-announcement?ref=sotkn.com), 16 Sep 2025\. 50 MW scalable to 90 MW, 23,040 GB300 GPUs in the first quarter of 2027, and up to 58,640 GPUs across the UK. 3. [Nscale Limited, Form S-1 registration statement](https://www.sec.gov/Archives/edgar/data/2110365/000119312526395475/ck0002110365-20260918.htm?ref=sotkn.com), filed 18 Sep 2026\. Microsoft's statements of work, the $103.4 billion total, grid connection risk, OpenAI's withdrawal from Stargate UK, Sines, and the Nvidia closing date. 4. [The Guardian, "Launch of UK's 'largest AI supercomputer' delayed by power supply problems"](https://www.theguardian.com/technology/2026/sep/24/construction-largest-supercomputer-delayed?ref=sotkn.com), 24 Sep 2026\. The early to mid-2030s power date, UK Power Networks' statement and the 45 GW peak comparison. 5. [Ofgem, "Ofgem acts to free up grid capacity by tackling speculative data centre projects"](https://www.ofgem.gov.uk/press-release/ofgem-acts-free-grid-capacity-tackling-speculative-data-centre-projects?ref=sotkn.com), 29 Jul 2026\. The commitment fee range, the 41 GW to 125 GW rise and the 73 GW of data centre demand. 6. [Ofgem, "Proposed data centre connection reforms" consultation page](https://www.ofgem.gov.uk/consultation/proposed-data-centre-connection-reforms?ref=sotkn.com), checked 18 Oct 2026\. The milestones, the 17 September close and the awaiting-decision status. 7. [Microsoft, "Microsoft announces quarterly earnings release date"](https://news.microsoft.com/source/2026/10/07/microsoft-announces-quarterly-earnings-release-date-69/?ref=sotkn.com), 7 Oct 2026\. Results on 28 October and the 2:30 pm Pacific webcast. 8. [NiSource, "NiSource announces long-term agreement with Microsoft"](https://investors.nisource.com/financial-news/news-details/2026/NiSource-announces-long-term-agreement-with-Microsoft-expected-to-increase-customer-savings-and-support-Indianas-economic-growth/default.aspx?ref=sotkn.com), 16 Oct 2026\. The 20-year term from 2028 and about 1,100 MW. 9. [Investing.com, "Anthropic offers Blackstone over 10% yield in $60B AI chip financing - FT reports"](https://www.investing.com/news/company-news/anthropic-offers-blackstone-over-10-yield-in-60b-ai-chip-financing--ft-reports-4955122?ref=sotkn.com), 16 Oct 2026\. Project North Star terms as reported by the Financial Times. 10. [The San Francisco Standard, "Lurie signs data center moratorium, pausing new development"](https://sfstandard.com/2026/10/16/mayor-lurie-data-center-moratorium/?ref=sotkn.com), 16 Oct 2026\. The 45-day citywide pause. Not investment advice. The 42% share, the 39% share of UK GPUs and the fee amounts at 50 MW and 90 MW are our arithmetic from the sources above.