Posted on: 11/09/2025

The Electricity Settlement Company (ESC) is pleased to share that it has launched a new proof-of-concept tool to support Secondary Trading in the Capacity Market.

The Secondary Trading Eligibility Directory (STED), is a searchable list of Capacity Market Units (CMUs) that may be eligible for Secondary Trading. This is to assist Capacity Providers with finding Secondary Trading partners for the upcoming 2025/26 Delivery Year.

The STED is live on their website here: Secondary Trading Eligibility Directory – Electricity Settlements Company.

This initiative forms part of ESC’s broader strategy to drive operational efficiencies and add value to the Capacity Market.

The STED will support the delivery and efficiency of the Capacity Market by:

  • Reducing administrative burden when searching for a transferee to Secondary trade with.
  • Minimising time spent by the EMR Delivery Body processing ineligible Secondary Trading applications.
  • Helping ensure eligible transferees are not overlooked by potential trading partners.

The Directory is designed to support the National Energy System Operator’s (NESO) existing Secondary Trading process. There is no change to the existing Secondary Trading process and every Secondary Trade is subject to independent approval by the Delivery Body.

The STED currently includes eligible CMUs for both the 2024/25 and 2025/26 Delivery Years and will be updated in line with future Secondary Trading windows.

FAQs about the STED are available to view by clicking on the information button in the top right had corner of the STED dashboard.

If you have any feedback or further questions, please contact [email protected] or use the Feedback button on the Directory page.