Microsoft withdraws as anchor tenant from Nscale’s planned UK AI data center, citing power delivery delays

Microsoft has withdrawn as an anchor tenant from Nscale’s planned artificial-intelligence-focused data center project in Loughton, Essex, according to a report citing the move as tied to delays in the project’s power supply. The decision affects a facility that had been marketed as supporting Azure AI compute, a reference to the cloud infrastructure Microsoft provides to run AI workloads.

The development centers on a site outside London that Nscale had been planning to develop as an AI data center. Anchor-tenant arrangements typically involve a large customer committing to reserve substantial capacity, helping a developer finance and schedule construction and grid connections. In this case, Microsoft’s withdrawal reduces certainty around the timing and scale of the compute planned for Azure’s AI services.

The report also indicates that power delivery had become a gating factor for the Loughton facility. Data centers require large, stable electricity supplies, and grid connection timelines can make schedules slip even when servers and other building elements are ready.

Microsoft did not outline alternative plans for the Loughton area in the cited reporting, nor did it provide additional detail on whether it would take a different form of involvement with the developer or seek capacity elsewhere in the UK. The company’s statement, as described in the report, focused on the power supply delays as the reason for the withdrawal.

For the broader cloud and AI infrastructure market, the move underscores a recurring challenge: demand for AI compute continues to grow, but real-world capacity expansions are constrained by energy availability. In many European markets, developers compete for grid capacity and long lead-time electrical infrastructure work, which can force changes to commercial commitments.

Nscale’s project had been framed around supporting Microsoft’s Azure AI compute, putting the facility within the wider ecosystem of hyperscale cloud builders and regional power-constrained data center development. Even when data center construction progresses, the final ability to deliver usable power determines when compute can actually come online.

The report does not provide specifics on how Microsoft’s decision affects any financial terms, including whether Microsoft has agreed to any exit fees or whether Nscale has revised timelines. It also does not disclose whether Microsoft’s withdrawal is temporary or permanent, beyond linking the decision to the power supply schedule.

What to watch next is how Nscale communicates any revised power and commissioning milestones, and whether Microsoft indicates new commitments to other UK sites or a restructured arrangement that aligns with revised grid delivery timelines.