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Era4 has released details of The Mill, an AI campus on a former steelworks in Newport, South Wales, designed to reach 1GW of power at full build-out. The campus has room for the equivalent of up to 400,000 Nvidia VR200 GPUs, and the first phase is due online in 2027. Data Center Dynamics reported the plan in detail on Oct. 22.
The 230-acre site sits on Corporation Road along the River Usk. Earlier this year, Newport City Council granted change-of-use consent for modular capacity inside an existing building there.
Era4, known as Carbon3.ai until March 2026, owns the land. It plans to build AI infrastructure on about 20% of it, chief commercial officer Karl Havard told SiliconANGLE. Era4 has set aside the rest for a wider redevelopment with a technical college, a sports and leisure facility, and conservation and research areas for schools and universities.
"It brings the community back to life because we're going to build a vocational tech college as part of it," Havard said. "Newport City Council has asked for sports facilities and a swimming pool. We're going to build that on behalf of them."
Era4 plans closed-loop cooling to cut water use, with direct-to-chip liquid cooling and an option to send recovered heat to the swimming pool. The original brick chimney will stay as a landmark on the 1.6km site. The site also falls inside the UK government's South Wales AI Growth Zone, which brings priority grid access and business incentives.
Era4 says it has more than 40 brownfield sites and a 4.5GW pipeline, mostly on landfill and old industrial land. Its smaller projects have had mixed results in planning. Canterbury City Council approved a landfill gas-fed data center in Kent on Oct. 16. A proposal at Amlwch on Anglesey was refused.
Baxtel tracks 32 data center facilities across Wales, run by 15 providers. The largest is Vantage's CWL13 campus at 80 MW. Nothing in Wales today comes close to 1GW.
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