Ofgem reforms target phantom data centers clogging UK grid queue
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UK energy regulator Ofgem proposed reforms in July to force speculative data center projects out of the grid connection queue. Developers would face steep nonrefundable deposits and must prove funding and customer commitments. The queue's total energy demand surged from 41 GW in November 2024 to 125 GW by June 2025, with data centers accounting for 73 GW.
Key Facts
- Ofgem proposed reforms in July requiring data center developers to pay nonrefundable deposits that could reach hundreds of millions of dollars for the largest projects.
- Between November 2024 and June 2025, total energy demand in the UK grid connection queue rose from 41 GW to 125 GW, with data centers making up 73 GW.
- The UK government designated data centers as critical national infrastructure around the end of 2024.
- Ofgem's feedback process on the reforms ends in September, after which the plans will be finalized.
Queue Congestion
The UK grid connection queue began swelling toward the end of 2024, coinciding with the government's designation of data centers as critical national infrastructure. Between November 2024 and June 2025, total energy demand in the queue increased from 41 GW to 125 GW, according to Ofgem. New data centers account for 73 GW of that demand, equivalent to one and a half times the UK's peak demand last year. The government believes much of that demand is speculative and unlikely to be built.
Proposed Reforms
Ofgem's July proposal would require developers to pay a steep, nonrefundable deposit that could balloon to hundreds of millions of dollars for the largest data centers. Developers would also need to line up customers in advance and prove they have funding to complete their builds. The reforms are set to be finalized after an industry feedback process that ends in September. Ofgem deputy director Nathan Macwhinnie said the regulator recognizes data centers as key to the UK's AI ambitions and future economic growth.
Industry Concerns
Industry experts warn the reforms could make the UK one of the world's most expensive places to build a data center, given already high energy costs and land scarcity. Alex Burgoyne, head of data centers at Knight Frank, said the buildout is bringing huge capital investment into the UK and cautioned against shooting the golden goose. Ofgem acknowledged industry concerns but said differences between international energy markets make like-for-like comparison difficult. Taco Engelaar, managing director at Neara, described the queue situation as absolutely insane.
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Ofgem reforms target phantom data centers clogging UK grid queue
