
https://www.inquisitr.com/4784253/russian-media-interfered-in-the-uks-brexit-referendum-new-report-claims/

https://uk.reuters.com/article/uk-britain-eu-options/stairway-to-brexit-barnier-maps-out-uks-canadian-path-idUKKBN1ED23R

https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_Brexit_customs_WEB.pdf