https://openeurope.org.uk/today/blog/what-would-a-no-deal-after-the-transition-period-look-like/
https://publications.parliament.uk/pa/cm201719/cmselect/cmintrade/520/520.pdf
https://blogs.lse.ac.uk/brexit/2019/10/23/long-read-the-makings-of-brexit-and-the-road-ahead/
https://www.elibrary.imf.org/downloadpdf/book/9798400224119/CH004.xml