https://ukandeu.ac.uk/wp-content/uploads/2021/06/EU-UK-2030-Report.pdf
https://www.instituteforgovernment.org.uk/sites/default/files/publications/5704%20IFG%20-%20Frictionless%20Trade%20Web.pdf
http://ec.europa.eu/economy_finance/publications/pages/publication16004_en.pdf
https://www.cips.org/en/news/news/businesses-preparing-to-sever-supply-chain-ties-between-the-uk-and-the-eu-to-avoid-brexit-tariffs/