● Covered by 1 source · 1 reportMedium impact1 negative
UK's 'largest AI supercomputer' faces significant delays due to power supply issues
Key points
- Loughton AI supercomputer launch delayed past 2027.
- Power supply issues could push launch to mid-2030s.
- UK Power Networks cannot supply sufficient power.
- Ofgem reports 315 data centers awaiting grid connection.
Supercomputer Project Faces Major Setback
A significant AI supercomputer project in Loughton, Essex, initially announced in 2025 as the UK’s largest, will not meet its planned launch date. The project, developed by Nscale, now faces potential delays until the mid-2030s, far beyond its intended 2027 debut.
Power Supply Insufficiency Cited
The primary cause for the delay is the inability to secure adequate power supply. UK Power Networks (UKPN), responsible for connecting the site to the local grid, informed Nscale that the necessary power capacity will not be available until the early to mid-2030s. The Loughton site requires up to 90MW of capacity, comparable to the energy consumption of approximately 315,000 homes.
Broader Grid Connection Challenges
This issue is part of a larger trend impacting data center development in the UK. Ofgem, the energy regulator, reported 315 data centers are currently awaiting connection to the National Grid, representing a total demand of 73GW. This demand significantly exceeds the country's peak energy demand of 45GW. UKPN noted that many data centers require wider national electricity transmission network upgrades before they can operate.
Nscale's Response and Project Context
Nscale stated its commitment to the project and is exploring options such as onsite power generation and accelerating the connection process. The site, previously an operational scaffolding yard, has been cleared. The UK government cited the Loughton project in its 2025 AI strategy, calling it the 'largest UK sovereign AI datacentre'.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Reporting from
The UK's planned 'largest AI supercomputer' in Loughton, Essex, announced in 2025, will miss its launch date and could be delayed until the mid-2030s due to insufficient power supply. This delay highlights growing energy infrastructure challenges for large-scale data center developments in the UK.