Ofgem has proposed a new financial commitment test for data centre developers as it seeks to remove speculative projects from Britain’s increasingly congested electricity connection queue.
Applications for large demand connections have risen from 41GW to 125GW in less than a year, according to the energy regulator, with data centres accounting for at least 80GW of the total. Projects without firm financing, customers, land, or procurement plans can reserve scarce network capacity, delaying developments that are ready to proceed and complicating investment decisions across the electricity system.
Under the consultation, developers would pay a refundable commitment fee of between £237,500 and £712,500 for each megawatt of requested capacity. Ofgem estimates that the charge would represent approximately 2.5% to 7.5% of the average cost of a data centre project.
The money would be returned when a development connects to the grid, but could be forfeited if a scheme withdraws early or fails to meet agreed milestones. Applicants may also have to demonstrate financial capability, commercial maturity, procurement progress, and evidence that their delivery timetable is credible.
Eleanor Warburton, Ofgem’s director for energy systems planning and connections, said: “Britain’s electricity demand connections queue has more than tripled in size in less than a year, and consumers should not bear the risks created by speculative projects taking up space in the system.
“The connections system must work for consumers and for the projects that are ready to invest, build and connect. Where speculative projects take up space in the queue, they can delay other schemes and create uncertainty about future network needs.”
The consultation closes on 16 September 2026 and forms part of a wider restructuring of Britain’s connection regime. A largely first-come, first-served system is being replaced with one that gives greater priority to projects considered ready and strategically valuable.
Earlier reforms have accelerated 7.8GW of projects by an average of six years, Ofgem said. The next stage addresses demand developments, particularly data centres, whose electricity requirements can rival those of large industrial facilities or sizeable towns.
Grid access has consequently become a material development cost rather than an administrative step. Technology groups, specialist operators, property investors, and infrastructure funds compete for sites offering sufficient power, fibre connectivity, cooling capacity, and planning consent. When capacity is reserved without credible delivery plans, uncertainty can spread across every other project relying on the same regional network.
Demand has expanded as cloud providers, artificial intelligence companies, public bodies, and large enterprises increase computing capacity. Generative AI workloads require substantial processing power, while operators also need electricity for cooling systems, back-up infrastructure, security, and network equipment.
Manufacturers, housing developments, battery storage projects, transport infrastructure, and electrification programmes rely on timely connections to the same system. Where network operators cannot distinguish mature demand from speculative applications, reinforcement plans may be based on capacity that is never used, while projects capable of progressing sooner remain delayed.
The proposed fee also reallocates some of the financial risk. Network development costs can ultimately feed into regulated charges, meaning abandoned projects may create expenditure recovered from a wider customer base. A sufficiently large commitment payment would require developers to carry more of the cost created by reserving capacity, although Ofgem must avoid excluding credible schemes whose commercial agreements cannot be completed before a connection offer is secured.
Financing structures add further complexity because data centre projects often involve landowners, developers, operators, tenants, lenders, and power suppliers entering agreements at different stages. Requiring evidence of commercial maturity could reduce queue inflation, but may favour larger groups able to commit capital before contracts with future customers have been finalised.
Planning changes may shorten approval periods, but faster infrastructure consent will have limited effect where electricity capacity remains unavailable. Power access, rather than land or planning alone, is increasingly determining where large computing facilities can be developed.
The charging structure will need to distinguish between speculative applications and legitimate uncertainty within complex projects. Too low a fee may leave the queue unchanged, while an excessive charge could deter new entrants and reinforce the position of the largest operators.
Ofgem’s final framework will influence where new computing infrastructure is built, how quickly it can connect, and how much financial evidence developers must provide before securing network capacity. It will also affect investment decisions across sectors competing for the same constrained electricity system.
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