Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

Capacity Market definition

What does Capacity Market mean? In practice, a capacity market is the framework under which generators, battery storage and demand‑side response are paid to be available at times of system stress, to support security of electricity supply and underpin investment and plant retention. In Great Britain, the Capacity Market is established by the Energy Act 2013 and detailed regulations and rules. National Grid ESO (as EMR Delivery Body) runs T‑4 and T‑1 capacity auctions. Successful bidders enter capacity agreements with availability payments and performance penalties for non‑delivery; agreement lengths vary (typically one year for existing plant and up to 15 years for new...

Great Britain Capacity Market: legislation, rules, eligibility, auctions, capacity agreements, roles, reviews and reforms, with Tempus State aid context and subsidy control considerations for net zero

Published by a LexisNexis Energy expert

Practice notes

For comprehensive analysis of how regulation, consenting and incentivisation shape the net zero energy transition within the legal framework of England and Wales, consult: Collinson and Hockman on Energy Law: Regulating, Consenting and Incentivising the Energy Transition. That textbook provides thorough treatment of topics addressed in this Practice Note.

What is Electricity Market Reform and the Capacity Market?

The Capacity Market (CM) forms a component of the government’s broader Electricity Market Reform (EMR) programme...

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Sarah Pollock

Herbert Smith Freehills Kramer

Sarah is a corporate energy partner at Herbert Smith Freehills LLP (HSF) with a focus on advising private and public sector clients on large and complex projects, including acquisitions, joint ventures and project development. In particular, Sarah advises clients on their investment in and development of power sector assets including conventional, renewable and nuclear generation the corresponding regulatory frameworks. She regularly acts for utilities, IPPs, financial investors, lenders, governments and regulators....

Web page updated on 21/05/2026

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