Nscale's £2bn UK Data Centre Hit by Grid Delay
13 Jul 2026
Nscale's flagship £2bn data centre in Essex, UK — intended to supply Nvidia GPUs to customers including Microsoft — is facing a delay after being told that its power supply will not be ready in time for the planned 2027 opening. The site is awaiting a 90-megawatt grid connection, and no confirmed new opening date has been given.
What happened
The Essex project, one of Nscale's flagship builds, was expected to open in 2027. That timeline is now at risk because the necessary grid connection is lagging. In response, Nscale is in discussions with California-based Bloom Energy about using solid oxide fuel cells as an alternative power source — though the cost or timeline implications of that switch are not yet clear.
This isn't the first power-related setback for the company. Earlier this year, OpenAI suspended Nscale's Northumberland UK site project, citing high energy costs. The current status of that Northumberland project has not been specified.
The bigger picture
The Essex delay may not be an isolated incident. According to Sightline Climate, 26% of data centre capacity was delayed in 2025, and the firm estimates that 30–50% of global data centre capacity expected for 2026 could be delayed due to power constraints, equipment shortages, or local opposition. That suggests Nscale's situation reflects a wider industry pattern rather than a company-specific problem.
Nscale is not short on capital or backing — the company has secured over $5 billion in funding, with backers including Nokia, Nvidia, Dell and Blue Owl. It is also currently developing data centre projects across five countries, which may help offset the impact of delays at any single site.
Numbers at a glance
- £2bn — estimated cost of the flagship Essex data centre
- 90 MW — grid connection the Essex site is awaiting
- 26% — data centre capacity delayed in 2025, per Sightline Climate
- 30–50% — estimated share of global 2026 data centre capacity that could be delayed
- $5bn+ — total funding secured by Nscale
- 5 — countries where Nscale is currently developing data centre projects
What's still unclear
Several details remain unresolved: the reason for the grid connection delay itself hasn't been detailed, there's no confirmed new opening date for Essex, and it's unclear how customers like Microsoft are responding to the delay. The cost and timeline implications of a potential switch to Bloom Energy fuel cells are also unconfirmed.
Why founders should care
If infrastructure bottlenecks — rather than capital — are becoming the primary constraint on large-scale compute projects in the UK, founders building products dependent on data centre capacity may face meaningful delay risk through 2026, particularly given Sightline Climate's estimate that up to half of global capacity could be affected. Nscale's move toward fuel cell power could also signal growing founder and investor interest in energy solutions that reduce dependency on traditional grid timelines. Separately, the earlier OpenAI suspension over energy costs suggests that power cost volatility is likely becoming a more prominent due-diligence factor when partnering with AI infrastructure providers — something founders relying on third-party compute may want to weigh into contract and timeline planning.