Grid delays hit Nscale's £2bn UK data centre project
A grid bottleneck has pushed back the opening of Nscale’s £2bn Essex data centre, highlighting the power supply crisis threatening global AI infrastructure expansions.
Nscale will miss the planned 2027 opening of its £2bn Essex data centre after the local grid operator indicated a required 90-megawatt power connection will not be ready in time. The flagship facility is designed to supply critical Nvidia GPUs to major technology clients, including Microsoft.
The delay exposes a fundamental vulnerability in the rapidly expanding artificial intelligence supply chain: physical power infrastructure cannot keep pace with compute demand. Data centres require vast amounts of electricity, and limited grid capacity has emerged as a primary bottleneck for developers across the UK.
To mitigate the financial damage, Nscale is pursuing alternative power arrangements. The company is in discussions with California-based Bloom Energy to supply electricity using solid oxide fuel cells, bypassing the delayed permanent grid connection. An Nscale spokesman said the company "remained fully committed to the Essex project."
Interim solutions are financially necessary. If operators fail to deliver contracted compute capacity on schedule, they are often required to pay financial penalties to their customers to account for the shortfall. For a company that has secured over $5bn in funding from high-profile backers including Nvidia, Dell, Nokia, and Blue Owl, missing contractual milestones risks straining those valuable relationships.
Nscale’s struggle is not an isolated incident, but rather a symptom of a global infrastructure crunch. According to Sightline Climate, 26% of data centre capacity was delayed in 2025. The research provider estimates that 30% to 50% of the global data centre capacity expected for 2026 could face similar setbacks. These delays are driven by a combination of power constraints, equipment shortages, and local opposition to new developments.
The UK market has proven particularly difficult for high-density computing facilities. Earlier this year, OpenAI suspended a separate Nscale site in Northumberland, citing high energy costs as the primary reason. Faced with domestic grid limitations and expensive power, the London-headquartered firm is now spreading its risk by developing data centre projects across five different countries.
