Green Mountain signs unnamed neocloud to 14MW in Romford

Romford rarely enters the London data center conversation alongside Slough or the Docklands, but Green Mountain now has a number to argue with: 14MW committed by an unnamed neocloud customer at its LON-East campus. The operator said the tenant has taken the full block of recently delivered capacity, filling the expansion across six data halls and giving the East London site a tenant whose needs track AI-density workloads.

LON-East totals 37MW of capacity, according to Green Mountain, with the newly committed 14MW capable of supporting rack densities above 100kW through liquid cooling, a spec aimed squarely at AI workloads. Green Mountain began work on the expansion in December 2023, and the campus still holds room for another 16MW of build alongside 11,000 square meters of existing building space and 5,546 square meters under construction. The freehold it acquired earlier this year gives long-term control of the site that came with Infinity SDC, the deal Green Mountain closed in January 2023.

Green Mountain UK managing director Simon Blackburn called the signing an important milestone and a strong endorsement of the campus and the company's UK strategy. Neocloud operators, he said, are at the forefront of AI infrastructure growth, and their requirements for power density, scalability, connectivity and speed to market are 'particularly demanding.' On connectivity, the campus links via major fiber routes to the City of London, London Docklands and Slough, putting a tenant's traffic options a short haul from Romford rather than a trip across town.

Speed to market is the other line in Blackburn's quote, and the sequence suggests it mattered more than pre-lease certainty: Green Mountain started the 14MW build in December 2023, delivered the halls, and signed the tenant after the capacity was live. For a tenant demanding density and connectivity, the ready building is the product.

The demand is real, but the counterparty is not named, and that distinction has consequences for how the deal should be read. A 14MW commitment from an identified neocloud operator with a balance sheet to be examined would be one thing; one from an unnamed tenant is being underwritten on the asset rather than on a credit: freehold, delivered building, dense racks. That is the arithmetic of merchant capital. As this publication has argued, hyperscaler-anchored assets get infrastructure pricing, while everything else fights for capital; an unnamed neocloud tenant's commitment will service the debt on the delivered building but will not, by itself, put the next expansion on the same footing as a hyperscaler lease.

The deal leaves London's data center geography intact but rearranges Green Mountain's near-term cash flows, and it offers a test for secondary submarkets. Romford is not Slough, and a 14MW commitment does not make it one, but a freehold building with density and fiber can attract neocloud demand outside the established addresses. The sequencing is merchant construction — building first, signing after — which leaves Green Mountain carrying risk until the next commitment lands instead of sitting on a hyperscaler pre-lease. The freehold makes that risk bearable: the operator controls the expansion timeline and can add the 16MW without negotiating with a landlord. Optionality has value only if demand arrives, and the 14MW tenant makes the first piece of the plan credible without making the second piece inevitable.

The next commitment, if it comes, will likely be measured against the 16MW of potential expansion. For infrastructure investors, that is the line between a milestone and a strategy: a campus with one 14MW tenant and a freehold is a stabilized asset, while a campus that can prove repeat demand — the same tenant growing or a second neocloud arriving — starts to price like a franchise. Green Mountain has cleared the first hurdle. The 16MW question is where the value, and the risk, live.