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How does Supplemental Balancing Reserve (SBR) affect Settlement?

Although users will see System Operator warnings on the Balancing Mechanism Reporting Service (BMRS), the  System Price calculation on the BMRS will not include SBR actions with the correct price. The SBR actions will need to be re-priced to the Value of Lost Load which is £3,000/MWh.

On the following working day, an ELEXON Circular will be published to confirm the use of SBR and the affected Settlement Periods. We will then re-calculate the System Price and publish this via another Circular by the second working day.

For a revised price to enter Settlement, National Grid will submit a revised Buy Price Adjuster (BPA) which will apply in the Interim Information (II) run. The BPA is added at the end of the System Price calculation and is being used as a workaround. The System Price will then be used in the Settlement Data for Energy Imbalance Charges.

Although still in the Balancing and Settlement Code (BSC) this product is no longer used by National Grid as of 1 March 2017.