LCCC determines the ILR and TRA for the Nuclear Regulated Asset Base scheme for Q4 2025

LCCC has made the first determination of the Nuclear Regulated Asset Base (RAB) scheme’s Interim Levy Rate (ILR) and Total Reserve Amount (TRA) for the Obligation Period commencing on 1 October 2025 and ending on 31 December 2025. This quarterly obligation period will be split into two parts, each with different ILRs and TRAs as part of how the RAB scheme is being set up and launched. This has occurred in two parts due to the nature of the timeline which pushes payments to the beginning of November. All future obligation periods for the Nuclear RAB scheme will have a single ILR and TRA value published, unless an adjustment is needed

Until 31 October 2025, the amounts are:

RAB ILR = £ 0.000 /MWh

RAB TRA = £ 0.00

From 1 November 2025 to 31 December 2025, the amounts are:

RAB ILR = £ 3.455 /MWh

RAB TRA = £ 8,307,825.45

The payment due date for the TRA is 14 November 2025, in line with the 30-day payment terms.

Operational Costs Levy (OCL)

The Operational Costs Levy rate is set, and the amount is:

RAB OCL = £ 0.0028 /MWh

The RAB OCL will apply to all settlement dates, starting from when LCCC enters into the revenue collection contract with the generator (this date will be notified to all Suppliers separately to this communication). It will be levied based on the Balancing and Settlement Codes’s SF run data, in exactly the same way as the CfD OCL.

Important Note

Please note that these values are for the Nuclear RAB scheme calculated under The Nuclear Regulated Asset Base Model (Revenue Collection) Regulations 2023. They must not be confused with the levy parameters for the CfD scheme which are unaltered by this announcement. EMRS has published a News item to support Suppliers with the timings of activities and the Credit Cover requirements. Also, please visit the Stakeholder Support for Supplier Nuclear RAB on the EMRS website as this steps you through the various activities you will need to complete following this announcement. The Nuclear RAB dashboard and forecasting can be found on the LCCC scheme dashboards.

The ILR and TRA presented in this bulletin refer to the Nuclear Regulated Asset Base. They have no relation to the ILR nor to the TRA of the Contracts for Difference (CfD) Scheme.