On 22 July 2025, Sizewell C gets green light with final investment decision, confirming a Final Investment Decision for Sizewell C, which will be the first project to use the nuclear Regulated Asset Base (RAB) model. Further details of the project can be accessed here: documents for the Sizewell C new nuclear power station.
To support Suppliers, the Department for Energy Security and Net Zero (DESNZ) asked us to share an update having reached this major milestone. The department is keenly aware of the importance of Suppliers receiving key information and timescales for the implementation of the RAB revenue mechanics. Low Carbon Contracts Company (LCCC), as the counterparty for revenue collections contracts will provide further details of the Interim Levy Rate and Total Reserve Amount in the coming weeks. Following this decision, DESNZ expect the revenue collection contracts to come into force this Autumn. Full details can be found in the letter issued to Suppliers: ‘DESNZ letter to Electricity Suppliers’.
To support your preparations for the Nuclear RAB scheme, we’d like to highlight the following resources:
- Presentation slides, recording and full Q&A from the Nuclear RAB Webinar hosted last week for Suppliers – available in the News section of our website.
- Implementation of Nuclear RAB Latest Change webpage – details the changes implemented to support the scheme.
- Stakeholder Support for Supplier Nuclear RAB webpage – provides guidance on lodging Credit Cover and understanding the different payment types.