Summary
- An unnamed neocloud customer has contracted the newly delivered 14MW of LON-East capacity.
- The 37MW Romford campus can support air, liquid, and hybrid cooling and racks above 100kW.
- Green Mountain has power and planning secured for another development phase at the eight-acre site.
Green Mountain has signed an unnamed neocloud operator for 14MW of capacity at its LON-East campus in Romford, filling the site’s recently completed AI-ready expansion.
The customer will occupy the full 14MW block, according to the operator. Green Mountain has not disclosed the customer’s identity, commercial value of the contract, deployment timetable, or expected IT hardware configuration.
LON-East is planned as a 37MW campus. The existing Romford facility had 7MW operating before the latest 14MW phase was delivered, leaving another stage available as Green Mountain develops the remaining capacity.
The new space has been designed for high-density workloads and can use air, liquid, or hybrid cooling. Green Mountain says the infrastructure can accommodate rack densities above 100kW with advanced liquid cooling.
Neocloud demand reaches delivered capacity
The agreement is useful evidence of demand because it attaches a customer to completed infrastructure rather than to a long-range development pipeline. That difference has become more important as European AI capacity announcements grow larger and grid-constrained projects compete for customers, capital, and equipment.
Neocloud operators have emerged as significant buyers of accelerated-compute capacity, leasing data centre space and deploying large GPU clusters without necessarily owning the underlying facilities. Their technical requirements can be more demanding than conventional enterprise colocation because large accelerator systems concentrate electrical load and heat into fewer racks.
DataCentral reported in August that European AI-focused colocation signings reached 420MW in the first half of 2026, with operators showing greater willingness to contract with neocloud counterparties as the market matures.
The Romford agreement fits that pattern. The customer gains an existing London facility with power, network connectivity, and high-density cooling already available, avoiding at least part of the lead time associated with developing a new campus.
Green Mountain, in turn, reduces the utilisation risk on its newly delivered capacity. The remaining question is how quickly the customer installs equipment and converts the contracted megawatts into operating IT load.
Romford provides a London expansion base
Green Mountain acquired the freehold of the eight-acre LON-East site in 2026, giving it full ownership of a campus where the original 7MW facility had been operating since 2010.
The operator says it has both power and planning secured for a further development phase. In London, those two conditions can be more valuable than land alone: a viable site must line up electrical capacity, planning consent, fibre, cooling, construction, and customer demand before additional white space can become usable capacity.
The campus sits on fibre routes linking East London with the City, Docklands, Slough, and international destinations. Green Mountain describes it as carrier-neutral with multiple diverse fibre entry points.
The 100kW-plus rack capability also makes cooling configuration a central operating issue. Supporting high densities is not simply a matter of adding liquid connections at the rack. Pumps, heat exchangers, distribution pipework, leak detection, water chemistry, controls, and heat rejection have to operate as part of the facility’s wider resilience design.
Those systems will now face an actual customer workload. Contracting the full 14MW expansion is the commercial milestone; deployment, commissioning, and the resulting power density will show how much of the campus’s high-density design is used in practice.
Green Mountain’s remaining Romford phase gives it room to extend the site beyond the newly contracted block. Whether that next capacity is built at the same pace will depend on customer demand and the schedule for turning the available power and planning position into another deliverable construction package.
