Capacity Market: Hydrogen to Power and interconnectors consultation

Ensuring security of electricity supply is vital to successfully achieving the Prime Minister’s Clean Energy Superpower Mission.

The Capacity Market is at the heart of the government’s strategy for ensuring security of electricity supply in Great Britain. It was first introduced in 2014 as part of the Electricity Market Reform programme to support investment in capacity and deliver value for money for consumers.

This call for evidence closes at 11:59pm on 27 November 2025.

The Capacity Market Rules (the Rules), which set out the requirements on its participants, are regularly reviewed. This is to ensure the scheme remains fit for purpose and reflects changing market conditions. To support future policy development, the government is publishing this call for evidence to: 

• Gather evidence to inform how Hydrogen to Power (H2P) plants should be categorised within the CM to enable the participation of H2P as a new technology. This includes gathering evidence related to the operation and reliability of H2P plants.
• Test stakeholder views on updating the methodology for the technical adjustment element of the process by which interconnector de-rating factors are set, including testing how high-impact low-probability events should be treated within this methodology.

The call for evidence is open to anyone to respond to, but will be of particular interest to:

1. Energy industry
2. Consumer groups
3. Academia
4. Think tanks
5. Other organisations who have an interest in security of supply and decarbonisation

Read the full consultation document below.