Ofgem targets speculative data centre schemes with fees

Ofgem has unveiled proposals to discourage speculative data centre developments from securing electricity grid connections, as the regulator seeks to free up capacity for projects that are ready to proceed.

The consultation, launched today, would introduce a new commitment fee and tougher progression milestones for large data centre schemes applying to connect to Britain's electricity network. The measures are designed to prevent developers from reserving scarce grid capacity without a realistic prospect of delivering a project.

The proposals come after applications for electricity demand connections more than tripled in less than a year, rising from 41GW to 125GW. Data centres account for the vast majority of that increase, with at least 73GW of current applications linked to the sector.

Ofgem said it was concerned that a significant proportion of projects in the queue may never be built, potentially delaying viable developments while distorting forecasts for future electricity network investment.

Under the proposals, developers of large data centres would pay a commitment fee when accepting a grid connection offer. The payment, ranging from £237,500 to £712,500 per megawatt, would be refunded once a project is energised but forfeited if the developer withdrew from the queue before construction.

In addition, developers would be required to demonstrate that projects are making genuine progress through a series of new milestones covering areas such as financial capability, commercial maturity and procurement activity in order to retain their place in the queue.

The consultation forms part of Ofgem's wider programme of electricity connections reform, developed alongside the Department for Energy Security and Net Zero (DESNZ) and the National Energy System Operator (NESO), which aims to prioritise projects capable of progressing to construction while removing those that remain speculative.

The regulator said the rapid growth in demand for grid connections has highlighted weaknesses in the existing system, where developers can reserve capacity years in advance with relatively little evidence that schemes will proceed.

For the data centre sector, the reforms could represent a significant shift in how grid capacity is allocated.

Access to high-capacity electricity supplies has become one of the defining challenges facing new data centre development as artificial intelligence, cloud computing and digital infrastructure continue to drive demand for power. With available grid capacity increasingly constrained in parts of the UK, connection dates have become a critical factor in determining where facilities can be delivered.

Industry observers have also raised concerns that some organisations have sought grid connections primarily to preserve future development options or enhance land values, rather than because projects are sufficiently advanced to enter construction. By introducing financial commitments and stricter evidence requirements, Ofgem hopes to ensure that capacity is reserved for developments with a realistic pathway to delivery.

The regulator believes the changes will also improve long-term network planning by providing a more accurate picture of future electricity demand.

Eleanor Warburton, Ofgem's Director for Energy System Design and Development, said consumers should not bear the risks created by speculative projects occupying space in the connections queue.

She said the proposed reforms would help ensure projects demonstrate genuine commitment before securing scarce network capacity, allowing investment-ready developments to connect more quickly while improving confidence in future network planning.

The consultation remains open until 16 September 2026, with the proposed measures forming part of wider reforms intended to create a faster, more reliable and investment-focused electricity connections system.

For developers with active schemes, the changes are likely to be welcomed if they reduce waiting times for grid access. However, they also signal that securing a place in the queue will increasingly require demonstrable progress rather than long-term development aspirations alone.