Key takeaways
- Microsoft has terminated its agreement to anchor Nscale's planned AI data centre in Loughton, Essex, according to a Telegraph report relayed by Reuters on October 18, 2026.
- Grid officials reportedly told Nscale that power for the Loughton site may not arrive until the 2030s, which undermines the original plan to open in 2027.
- The withdrawal leaves the site with no publicly announced customer and adds scrutiny to Nscale's US listing, reported to target about $3bn raised at a roughly $35bn valuation.
- Nscale says its other Microsoft contracts are unaffected, and Microsoft had not publicly commented at the time of the reports.
Microsoft has pulled out of its agreement to anchor a planned AI data centre at Loughton in Essex, according to a Telegraph report on October 18, 2026, which Reuters relayed. The facility belongs to the British AI infrastructure company Nscale, which has been preparing a US stock market listing. The microsoft data centre essex withdrawal matters because it exposes how grid constraints can undermine both a government-backed AI project and the financing built around it.
Nscale is a London-headquartered firm that operates data centres and GPU cloud infrastructure. It describes itself as Britain’s “sovereign” AI provider and is backed by Nvidia, according to the Telegraph. Reuters reported that Microsoft is one of Nscale’s two largest customers.
Why did Microsoft pull out of the Essex data centre?
Reports point to electricity supply. The Telegraph said Nscale had faced repeated delays, and that national grid officials told the company they did not expect power for the site until the 2030s. The Telegraph did not establish a specific reason for Microsoft’s decision, according to Investing.com, while the Guardian reported that the exit was over concerns about power supply.
The project had been scheduled to open in 2027. Under the original plan, Microsoft would lease 23,000 Nvidia AI chips at the Loughton facility, which was designed to deliver about 90 MW of power. Microsoft had not publicly commented on the reported withdrawal, according to Investing.com.
Nscale said the grid problem is not specific to its site. A spokesperson told Reuters that the relationship with Microsoft “remains strong and long-term” and that the “London-wide grid issue” does not affect other contracts. The spokesperson added that the company is exploring alternative power sources and other UK expansion sites. The Guardian reported that Microsoft is understood to remain involved in another Nscale project in Norway.
What does the exit mean for Nscale’s IPO?
The timing is awkward for the company. Nscale filed for a US initial public offering last month, and its prospectus names Microsoft and Anthropic as expected major customers. Investing.com reported that the offering could raise as much as $3bn, and that Microsoft and Anthropic together account for roughly 85% of Nscale’s contracts.
Valuation reports vary by outlet. The Guardian, as carried by a syndicated copy, said the loss of an anchor tenant could undermine a Wall Street flotation at a potential valuation of $35bn. Crypto Briefing put the IPO target at $3bn raised and a $35bn valuation, and said Microsoft accounts for about $43.8bn of a $103.4bn contracted backlog. The Telegraph said Microsoft supplies more than 40% of that backlog, though the UK deal is believed to be a small part of it.
The Telegraph also reported that rival data centre developers have seen their share prices fall over the past week on fears they will struggle to repay debts as interest rates and inflation rise. It described the Nscale listing as a litmus test of investor appetite for debt-heavy AI businesses. That backdrop echoes the wider market concern covered in AI debt worries rattle global markets, pulling Treasury yields and dollar lower.
What does the Microsoft data centre Essex setback mean for UK AI policy?
The UK government had publicly backed the project. Keir Starmer’s government highlighted Loughton when announcing the UK’s AI strategy in 2025, calling it the “largest UK sovereign AI datacentre.” The Telegraph reported that ministers had lobbied local councillors to help push the scheme through.
Microsoft’s backing was also tied to a wider pledge. According to the Telegraph, the project formed part of £22bn in UK investment promised by Microsoft during Donald Trump’s state visit last year. Data Center Dynamics, at the time, reported the company’s UK commitment as $30bn in total, including a $15bn AI infrastructure push.
The episode illustrates a point industry commentators have raised: a creditworthy tenant and a well-funded developer cannot accelerate a congested grid connection. Financing for data centres generally depends on long-term commitments from large AI customers, as the Telegraph noted, so losing an anchor tenant can affect lending terms as well as construction schedules. Whether other UK sites face the same constraint is not yet established by the available reporting.
What to watch
- Microsoft’s response: whether the company issues a statement explaining the termination and confirming the scope of its remaining Nscale contracts, including Norway.
- Nscale’s IPO filings: any amended prospectus, risk-factor disclosure or change to the timetable, valuation or the roughly $3bn raise.
- Power solutions: whether Nscale details alternative on-site or off-grid supply for Loughton, and whether a new customer is announced.
- UK government and grid operators: any official comment on connection queues in the London area and on how the sovereign AI strategy is affected.
- Sector pricing: whether listed rivals such as CoreWeave and Nebius continue to fall on debt-repayment concerns.
Frequently asked questions
Why did Microsoft pull out of the Essex data centre?
Reports link the exit to power supply. The Telegraph said grid officials told Nscale electricity may not arrive until the 2030s. The Guardian cited power concerns, while the Telegraph did not establish a specific reason. Microsoft had not publicly commented when the reports emerged on October 18, 2026.
What is Nscale and why does the Microsoft exit matter for its IPO?
Nscale is a London-based, Nvidia-backed AI infrastructure company. It filed for a US listing last month, reportedly seeking about $3bn at a $35bn valuation. Microsoft was the only announced customer for Loughton, so its exit adds investor scrutiny to the offering.
Does Microsoft's withdrawal end its relationship with Nscale?
Not according to Nscale, which says the grid issue has no impact on its other Microsoft contracts. The Guardian reported that Microsoft is understood to remain involved in a separate Nscale project in Norway. Microsoft had not publicly commented at the time of the reports.
Sources
- Microsoft Pulls Out of UK Data Center Deal With Nscale, Telegraph Reports (Reuters via U.S. News)
- Microsoft axes AI deal in setback for UK data centre pioneer (Telegraph via Yahoo Finance)
- Microsoft drops huge AI datacentre project in Essex over power supply concerns (Guardian via Finwire)
- Microsoft pulls out of AI datacentre project in Essex over power supply concerns (Guardian, syndicated)
- Microsoft pulls out of UK data centre deal with Nscale, Telegraph reports (Investing.com)
- Microsoft scraps UK data center deal with Nscale, putting IPO plans at risk (Crypto Briefing)
- Microsoft to build UK's largest supercomputer as part of $15bn AI infrastructure push (Data Center Dynamics)
Top image: Acabashi / Wikimedia Commons (CC BY-SA 4.0)
This article was produced by the Intelligence Report Desk. Sources are linked below.
