https://www.bis.org/publ/arpdf/ar2017e_ec.pdf
https://www.projectnewsoasis.com/sites/default/files/2021-03/project-oasis-report-2021.pdf
https://publications.parliament.uk/pa/ld5901/ldselect/ldfsrc/133/133.pdf
http://visual.ons.gov.uk/trading-places-uk-goods-trade-with-eu-partners/