https://www.publications.parliament.uk/pa/cm201617/cmselect/cmintrade/817/817.pdf
https://www.gov.uk/government/news/david-davis-speech-to-the-suddeutsche-zeitung-economic-summit
https://ec.europa.eu/info/sites/info/files/com-2018-890-final.pdf
https://www.instituteforgovernment.org.uk/sites/default/files/publications/5704%20IFG%20-%20Frictionless%20Trade%20Web.pdf