Microsoft has pulled out of an agreement to take AI computing capacity at Nscale’s planned data centre in Loughton, Essex, after delays to the electricity connection pushed the expected supply date into the 2030s. Nscale says it still intends to develop the site, and its other agreements with Microsoft remain in place.
The decision removes the anchor customer from a major UK computing project. When Microsoft and Nscale announced their plans in September 2025, the first GPUs were expected in early 2027. The electricity needed to run them may now be years away.
Microsoft’s withdrawal was reported on Sunday 18 October. The company clarified its position on Monday, saying the decision applied to the Essex site rather than its broader partnership with the British AI infrastructure provider. Reuters reported the grid delays and responses from both companies.
What had Nscale planned for Loughton?
Loughton was among the headline projects unveiled during a series of UK–US technology announcements in September 2025. Microsoft was due to use computing infrastructure built and operated by Nscale to provide capacity for its Azure cloud services in Britain.
Nscale intended the Essex campus to house what it called the UK’s largest AI supercomputer. Its September 2025 announcement outlined the planned equipment and power requirements:
- 23,040 NVIDIA GB300 GPUs in the initial deployment, planned for the first quarter of 2027.
- 50 megawatts of initial AI computing capacity, with the potential to expand the site to 90MW.
- Liquid-cooled, high-density infrastructure to accommodate large clusters of processors.
Those figures described the proposed facility, not an operating installation. With Microsoft now out of the Loughton agreement, neither the original hardware timetable nor that customer’s use of the capacity can be treated as continuing unchanged.
Microsoft was due to become the anchor customer, agreeing to take a substantial amount of computing capacity. For Nscale, that would have supported the business case for investing in specialist buildings, cooling, networking and expensive processors before the site could generate revenue.
Why has the electricity connection become such a problem?
A data centre packed with AI accelerators needs a substantial and dependable electricity supply. The processors do the computing, but the wider operation also needs storage, networking, cooling and electrical infrastructure. All of it must function continuously.
Reporting on the grid delays indicates that UK Power Networks may not be able to provide sufficient electricity to Loughton until the early-to-mid-2030s. That is far later than the early-2027 deployment originally advertised.
There is an important distinction between a shortage of electricity generation and a shortage of grid capacity at a particular location. Even where power can be generated elsewhere, getting it to a large new customer may require upgrades to local connections, substations or higher-voltage networks. Developers can face lengthy queues while those works are planned and delivered.
Buying newer GPUs cannot bring forward the power connection. Computing hardware changes rapidly, while major electricity infrastructure can take years to design and deliver.
Nscale says it is exploring alternative sources of power for the Essex site, along with other possible UK locations. It has not announced a replacement power arrangement or a confirmed new opening date.
Microsoft’s other Nscale agreements are not cancelled
Microsoft has withdrawn from Loughton, not from its broader Nscale partnership. Responding on 19 October, a Microsoft spokesperson told Reuters: “This decision relates to a single site.”
The companies announced a much wider package in October 2025, including planned NVIDIA computing capacity in Texas, Portugal and Norway. Those projects have their own locations, infrastructure and delivery arrangements. The Loughton decision has not been presented as a cancellation of those separate commitments.
Nscale has also reaffirmed its intention to continue with Loughton. Its challenge now is to find a workable energy solution and, potentially, another customer able to commit to the project on a revised timetable.
There is no announced change to existing Azure services for British customers as a result of the withdrawal. The affected capacity was intended for a future facility.
Power connections are becoming a test for UK AI development
The UK wants to attract more AI computing investment, but electricity networks are not always able to expand at the speed demanded by developers. The government’s AI Growth Zones programme aims to tackle barriers that include planning and access to power.
A contract for computing capacity is valuable only if the developer can deliver it. Nscale could announce the processor specification and secure a customer, but neither made the necessary grid connection available.
The hardware market is also changing. NVIDIA processors remain central to many AI deployments, while competing systems such as Amazon’s Trainium chips and TorchNeuron software are being developed to offer alternatives. Whichever hardware a provider chooses, it still needs a dependable electricity supply.
Long delays have another cost: a data centre designed around one generation of hardware may need its technical and financial assumptions revisited before it opens. In a sector where customers want capacity quickly, a project that cannot give them a dependable delivery date risks losing business elsewhere.
What happens to the Loughton site now?
Nscale says it still wants to develop the site. It must now establish whether an alternative power supply can bring the opening forward, whether another anchor customer is interested and whether the original hardware plans remain practical on a later timetable.
For Microsoft, leaving Loughton removes one planned source of additional computing capacity while preserving the possibility of working with Nscale at other sites.
Nscale’s next challenge is to secure a deliverable power connection and demonstrate that its construction schedule and commercial commitments can work together.
Tech Torque Verdict
Microsoft’s withdrawal is a blow to the Essex project, though describing the whole development as cancelled would go too far. Nscale still wants to build at Loughton, and the two companies are continuing to work together elsewhere.
The harder problem cannot be solved with a press announcement. High-performance AI computing demands specialist equipment, enormous investment and a reliable supply of electricity. If grid infrastructure takes years longer than the technology plans built around it, those plans have to change.
Loughton cannot host the supercomputer originally promised without sufficient power. Until Nscale has a reliable connection and a credible new timetable, the development remains a plan rather than an operational AI facility.
