
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/680185/Governor_letter_to_CX_-_Feb_2018.pdf

https://www.boeckler.de/pdf/p_imk_report_152e_2020.pdf

https://energy.ec.europa.eu/system/files/2022-05/COM_2022_230_1_EN_ACT_part1_v5.pdf