Ofgem's determinations on Tier 2 Capacity Market disputes: Delivery Year 2024 to 2025

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The Electricity Market Reform Delivery Body ("Delivery Body") is responsible for assessing prequalification applications for the Capacity Market and issuing its decisions. 

If an applicant disagrees with the Delivery Body’s decision, it may ask the Delivery Body to review it – a Tier 1 dispute. Following a Tier 1 review, the appellant can ask us to consider the Delivery Body's decision and make a determination – a Tier 2 dispute. 

Our review considers whether the Delivery Body had applied the Capacity Market Regulations and Capacity Market Rules correctly when making its decision, based on the evidence before it when it did so. 

We have a duty to publish our determinations in respect of Tier 2 Capacity Market Disputes. This page will be kept up to date with our determinations relating to appeals submitted within the 2024 to 2025 Delivery Year.

Main document

[Ofgem CM Determination 2025 - Bluefield Energy Ltd [PDF, 289.05KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20Letter%20-%20Bluefield%20Energy%20Ltd%20-%20DN.pdf)

[Ofgem CM Determination 2025 - Boom Bacup Storage Limited [PDF, 205.65KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20Letter%20-%20Boom%20Bacup%20Storage%20Limited%20-%20DN.pdf)

[Ofgem CM Determination 2025 - Grenergy Renewables UK Ltd [PDF, 268.90KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20Letter%20-%20Grenergy%20Renewables%20UK%20Ltd.pdf)

[Ofgem CM Determination 2025 - HEIT HP Limited [PDF, 662.49KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20Letter%20-%20HEIT%20HP%20Limited%20-%20DN.pdf)

[Ofgem CM Determination 2025 - HEIT WG Limited [PDF, 536.20KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20Letter%20-%20HEIT%20WG%20Limited%20-%20DN-03057.pdf)

[Ofgem CM Determination 2025 - Low Carbon UK Solar Operations [PDF, 217.51KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20Letter%20-%20Low%20Carbon%20UK%20Solar%20Operations%20-%20DN-03002%2C%2003074%2C%20and%2003112.pdf)

[Ofgem CM Determination 2025 - Mercia Waste Management Ltd [PDF, 229.78KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20Letter%20-%20Mercia%20Waste%20Management%20Ltd%20-%20DN-02815.pdf)

[Ofgem CM Determination 2025 - UK Power Reserve Limited and Sembcorp Utilities (UK) Limited [PDF, 179.72KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20Letter%20-%20UK%20Power%20Reserve%20Limited%20and%20Sembcorp%20Utilities%20%28UK%29%20Limited.pdf)

[Ofgem CM Determination 2025 - Warrington Renewables (York) Ltd [PDF, 531.04KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20Letter%20-%20Warrington%20Renewables%20%28York%29%20Ltd%20-%20DN-02873.pdf)

[Ofgem CM Determination 2025 - Prax Lindsey Oil Refinery Limited [PDF, 199.80KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-05/Determination%20letter%20-%20Prax%20Lindsey%20Oil%20Refinery%20Limited%20-%20DN-03916.pdf)

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