https://www.nakedcapitalism.com/2018/02/another-brexit-mess-grandfathering-existing-free-trade-agreements-looks-unlikely.html
https://www.inquisitr.com/4784253/russian-media-interfered-in-the-uks-brexit-referendum-new-report-claims/
https://ec.europa.eu/commission/sites/beta-political/files/customs_controls_0.pdf