https://openeurope.org.uk/today/blog/what-would-a-no-deal-after-the-transition-period-look-like/
https://uk.yahoo.com/news/wales-could-disappear-england-under-213835584.html
https://www.socialeurope.eu/eu-trade-policy-in-troubled-times
https://www.cesifo-group.de/DocDL/ifoDD_18-01_29-31_Achten.pdf