Era4 Plans The Mill AI Data Center Campus at Newport’s Liberty Steel Site
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Era4 has outlined plans to convert an unused building at the operating Liberty Steel site in Newport, Wales, into The Mill, an AI data center campus. The company states that the 93-hectare site is planned to have up to 1 GW of power supply, while the first phase is targeted for operation next year.
- Era4 plans The Mill AI data center campus at the Liberty Steel site in Newport, Wales.
- The 93-hectare project site is planned to receive 1 GW of energy supply; this is not confirmed operational data center capacity.
- The campus is presented as potentially able to accommodate up to 400,000 NVIDIA Vera Rubin accelerators.
- The first phase is planned for operation next year, but its capacity and a precise commissioning date have not been disclosed.
- Era4 intends to use closed-loop cooling and procure power from multiple sources through long-term contracts.
Era4 plans to develop The Mill as an AI data center campus within an unused building at Liberty Steel’s site in Newport, Wales. Liberty Steel continues to operate an industrial facility at the location, while the proposed data center would occupy the unused building.
The total project site covers 93 hectares. Era4 has stated that the site is planned to receive 1 GW of power supply. This is a proposed site energy-supply figure, rather than confirmed commissioned data center capacity.
The company has also indicated that the campus could accommodate up to 400,000 NVIDIA Vera Rubin accelerators. That figure is a potential hosting capacity, not a confirmed equipment procurement or installed configuration.
Era4 plans to commission the first phase next year, but has not disclosed its available power capacity or provided a specific commissioning date. The company intends to use a closed-loop cooling system designed to minimise water use. Electricity is expected to be sourced from multiple suppliers under long-term contracts, although the sources, contract terms and schedule for securing capacity have not been disclosed.
If implemented as announced, the project could add to demand for high-volume grid interconnection and contracted power in the UK. Reuse of an industrial site may reduce land and building constraints, but execution will still depend on the actual availability of power, the pace of phased capacity build-out and construction delivery.
The Mill is among the larger announced UK AI data center projects and illustrates the redevelopment of industrial property for power-intensive digital infrastructure. If delivered as outlined, it could increase competition for large grid connections and long-term power contracts; the project’s scale also points to substantial requirements for cooling and phased delivery.
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