Updated: Methodology updated to reduce double counting of renewable energy.
The Department for Business, Energy and Industrial Strategy (BEIS) publishes the annual fuel mix disclosure data as defined in The Electricity (Fuel Mix Disclosure) Regulations 2005.
This document sets out the calculations behind the residual fuel mix. The residual fuel mix is used by electricity suppliers to calculate the electricity they supply between fuel type when they do not hold generator declarations or Renewable Energy Guarantee of Origin (REGOs).
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