Microsoft exits 50MW at Nscale over a grid wait to the 2030s

Microsoft has walked away from its lease at the Loughton site in Essex that Nscale promoted as the UK's largest sovereign AI data centre, a 50MW project, after UK Power Networks said sufficient grid power would not reach it until the early to mid 2030s (Cloud Computing News). The reason matters more than the megawatts: nothing in that sentence is about demand for compute.

Measured against the record

50MW is small set against what Nscale has already sold. Microsoft contracted roughly 200,000 NVIDIA GB300 GPUs from the company across the UK, Europe and the US in October 2025, Nscale's largest commercial agreement to date (Nscale). The company has raised $6.4B in total (PitchBook), including $2B in a March 2026 Series C at a $14.6B valuation, the largest venture round in European history (Nscale), and it hired Goldman Sachs and JPMorgan in February to prepare an IPO (Reuters). An anchor customer dropping one building is not an anchor customer leaving.

What the decision prices is a queue

Nscale's own build plan already reads as an answer to the interconnection problem: five data centres under construction across the US, UK and Norway, including a 520MW Arctic site at Narvik and an off-grid West Virginia build sited next to its own gas plant (TIME). A company that puts a generator on its own land and a campus inside the Arctic Circle has already decided not to wait in line. Loughton is the site that depended on someone else's timetable, and it is the one that lost its tenant.

Nvidia sits on both sides

The same day, Nvidia was reported to be offering neocloud operators easier credit terms and to expect to reassign roughly $20 billion of data centre leases to third parties, with industry executives putting the number of AI cloud providers likely to survive at 7 to 10 out of hundreds (The Decoder). Nvidia is also inside Nscale's cap table: it joined the March Series C (Nscale), and of the $3.36B pre-IPO convertible financing announced in September, a $1B Nvidia commitment was expected in mid-November 2026, converting automatically into shares on completion of an IPO (Nscale). Add the $1.4B delayed-draw term loan backed by GPUs that Nscale signed in February with Pimco, Blue Owl and LuminArx (Data Center Dynamics) and the capital structure has a clear shape: the chips are collateral, the chip vendor is a shareholder, and the lease book is something the vendor expects to hand on.

What would change the picture

Not a cancelled lease. Three dated items on the record would:

• Whether the $1B Nvidia tranche lands in mid-November as the September financing said it would.
• Whether the IPO that those notes convert on actually arrives, two banks having been hired for it in February.
• Whether the Narvik and West Virginia sites energise on power Nscale controls, while projects sitting in the public queue wait for the 2030s.

A grid date is the one input in this business that capital cannot shorten, and it is now the thing deciding which buildings get tenants.