Summary
- The Cardiff East Park and Ride development will now be determined by Welsh Ministers.
- The application includes provision for a temporary 49.9MW generating facility.
- The ministerial direction changes the decision-making authority but does not grant or refuse permission.
Welsh Ministers have taken responsibility for determining a proposed data centre at Cardiff East Park and Ride, intervening shortly before Cardiff Council‘s planning committee was due to consider the controversial development.
The Welsh Government issued a direction dated 11 November requiring the application to be determined by ministers under section 77 of the Town and Country Planning Act 1990.
The intervention prevented the council’s planning committee from making its scheduled decision on 12 November.
Planning officers had recommended approval, but the application will now proceed through the relevant ministerial determination process.
The call-in does not constitute planning permission or a refusal. It changes who is responsible for assessing the proposal and reaching a final decision.
Curtis Hall Ltd is seeking consent to redevelop the existing Cardiff East Park and Ride site in Old St Mellons, with new data centre buildings, associated electrical infrastructure, access roads, landscaping, and other works.
The hybrid application includes up to 30,292 square metres of floorspace and provision for a temporary energy centre rated at 49.9MW.
That capacity relates to proposed electricity generation rather than a confirmed 49.9MW IT load within the data centre.
The temporary generating facility could support operations before a sufficient connection to the national electricity network becomes available.
Whether such an arrangement is implemented will depend on the relevant approvals, technical design, fuel supply, environmental requirements, and project economics.
The proposed development would also require the closure of the existing park-and-ride facility, which supports journeys associated with the University Hospital of Wales.
Campaigners have raised objections to the loss of that transport function, questioning the availability of an adequate replacement and the wider effects on local journeys.
Additional concerns include air quality, lighting, noise, water demand, flood risk, and the potential environmental effects of on-site electricity generation.
Those matters contributed to opposition to the project before the ministerial intervention.
The Welsh Government has identified issues extending beyond local importance, including potential conflicts with national transport, energy, and flood-risk policy, the scale of environmental effects, and the degree of public controversy.
The application also includes a proposed bridge across the Rhymney River, bringing transport and environmental assessments into the wider scheme.
A substantial data centre represents an industrial development even where the computing buildings themselves are relatively self-contained.
Electrical distribution equipment, cooling plant, standby systems, and the infrastructure required for continuous operation can create additional demands on the site and surrounding utilities.
The proposed energy centre adds a distinct engineering and environmental component.
Any gas-fired generating facility would need to address fuel arrangements, emissions, noise, electrical integration, and operating limits. It would also require a reliable relationship with the data centre’s internal distribution and backup systems.
The availability of temporary generation does not establish that the final grid connection is secured or that the computing facility can operate indefinitely without the intended network infrastructure.
The existing park-and-ride use creates another consideration.
Redeveloping an established site may reduce the need to develop entirely new land, but can displace public infrastructure whose replacement or loss must be assessed independently of the proposed investment.
The council had previously considered the application through its planning process, including objections and the developer’s supporting assessments.
Ministerial intervention means that those materials, together with any further evidence required, will inform a different determination process.
The project is part of a wider debate over the treatment of large data centres within planning systems increasingly required to assess electricity demand, environmental performance, and public benefit.
That debate does not predetermine the result in Cardiff.
The next procedural steps will establish how the application is examined and whether further material is required before a decision.
Until permission is determined, the proposed buildings and 49.9MW energy centre remain development proposals rather than committed operational infrastructure.
