https://www.gov.uk/government/news/joint-article-a-deep-and-special-partnership
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/677268/Letter_to_Business_Leaders__1_.pdf
http://www.strengthentheeuro.eu/fileadmin/files/user_upload/EZ_flashlight_europe_2017_05_ENG.pdf
https://ec.europa.eu/commission/publications/position-paper-essential-principles-financial-settlement_en