Condition 21 of the electricity supply licence requires an electricity supplier to publish specified information about:
Licensees who have supplied electricity throughout a disclosure period (1 April – 31 March) must, during the period of 12 months beginning on 1 October after the disclosure period:
The data to be published are:
When a supplier does not hold generator declarations, REGOs, or figures provided by electricity exchanges for some of its electricity supplied they should apportion the amount of electricity in accordance with the residual fuel mix percentages in BEIS’s Fuel Mix Disclosure.
The Fuel Mix Disclosure Data Table will be compiled and updated annually by BEIS and will be published on its website by 1 August each year. This table includes the table for the residual mix, which is compiled by BEIS based on the best available information on the actual mix of electricity not subject to generator declarations or REGOs after consulting major suppliers.
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