We are required under legislation to ensure that all suppliers provide (on bills and promotional materials) reliable information regarding the contribution of each energy source to their overall fuel mix and related environmental impact information over the preceding year. The information in this report is used by suppliers to provide information on their websites and on customer bills regarding this fuel mix and environmental impact.
The disclosures are based on 2018 calendar year data and must be published on bills no later than two months from the publication of this paper.