
https://visual.ons.gov.uk/commonwealth-trade-in-focus-as-uk-prepares-for-brexit/

https://theconversation.com/idea-of-eu-citizenship-still-intangible-for-most-europeans-230994

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