Summary
- Clearstone is proposing a 300MW AI data centre campus near Ebbsfleet, Kent.
- The project has been directed into the Nationally Significant Infrastructure Project planning regime.
- The scheme would connect to the UK transmission network and is targeting operation from 2030.
Clearstone is developing plans for a 300MW AI data centre campus near Ebbsfleet, moving another large UK digital infrastructure scheme into the national planning arena.
The proposed Ebbsfleet AI Data Centre Campus would sit on land near the HS1 railway line and A2 motorway, south of Ebbsfleet station in Kent. Clearstone’s project page lists a 300MW network connection capacity, a 58-hectare development area, a targeted operational date of 2030, and a 40-year project lifespan.
The scheme has been directed into the Nationally Significant Infrastructure Project regime under section 35 of the Planning Act 2008. A Development Consent Order process would replace the normal local-only planning route, raising the project from a regional development proposal into a test of how the UK handles very large data centre loads.
A campus built around transmission
Clearstone says the site is in the early design stage, with land and ecological surveys underway and cable routes being assessed to Northfleet East substation. The project also has a dedicated website for consultation material, with further public engagement expected as the design progresses.
The transmission connection is central to the scheme. Large AI campuses increasingly need power routes beyond the scale of ordinary distribution networks. That brings data centre planning closer to the world of substations, cable corridors, wayleaves, grid studies, and national energy policy.
The UK is already trying to reform electricity connections as demand from data centres, electrified industry, storage, renewables, and new housing competes for network capacity. A 300MW campus near London will be judged against that wider context. The question is not only whether the building can be permitted, but whether the grid works can be delivered on time and justified against other demand.
Clearstone says just under two fifths of the project site, 38%, has been set aside for landscaping, ecological enhancement, and public access. That land-use commitment will form part of the local case, but the project’s size means the power, construction, and environmental evidence will carry more weight as the planning process advances.
AI leaves the policy slide deck
The Ebbsfleet proposal turns AI infrastructure from a national ambition into a physical planning application. It means land, power, cooling, traffic, biodiversity, substations, building mass, jobs, and long-term operations.
That is where the UK’s digital infrastructure policy is becoming more difficult. Ministers have designated data centres as critical national infrastructure and want more domestic AI capacity. Communities are being asked to host large industrial facilities whose main customers may be global technology businesses or remote enterprise users.
Clearstone’s background in renewable energy, battery storage, and grid-connected infrastructure gives the scheme a different character from a conventional property-led data centre proposal. The company already operates in sectors where connection strategy, land assembly, planning, and grid reinforcement are core delivery issues. That experience may help, but it does not remove the need for detailed data centre evidence on cooling, resilience, construction phasing, and operating impact.
The 2030 target date also reveals the length of the delivery cycle. Even when demand is urgent, large data centre campuses need years to move through consultation, design, consent, grid works, procurement, construction, commissioning, and customer fit-out. AI demand moves quickly; transmission infrastructure does not.
The NSIP route sets a marker
The national planning route may become more common for very large UK data centre schemes. It can provide a clearer process for projects that sit beyond ordinary local planning scale, but it also brings deeper examination of need, alternatives, environmental effects, and community impact.
For developers, the bar is rising. A major data centre campus now needs a credible explanation of power sourcing, grid connection, cooling technology, water use, biodiversity, heat rejection, employment, and local benefit. The AI label will not carry the planning case by itself.
For policymakers, Ebbsfleet will test the balance between national digital capacity and local infrastructure pressure. The UK wants more compute, but each campus competes for land, grid capacity, and public acceptance. Clearstone’s project places that trade-off in a specific Kent landscape, tied to a specific substation route and a specific 300MW load.
The proposal is still early, and the final design may change through consultation. Its importance is already clear. UK data centre growth is no longer confined to business parks and incremental expansions. The next wave is moving into national infrastructure planning, where power is the starting point and consent is earned through evidence.
