https://www.wto.org/english/tratop_e/dispu_e/567r_e.pdf16 Jun, 2020
https://www.fraserinstitute.org/sites/default/files/economic-freedom-of-the-world-2021.pdf
https://www.bloomberg.com/news/articles/2019-09-11/world-s-oldest-customs-union-and-u-k-reach-a-post-brexit-deal
http://www.cbi.org.uk/index.cfm/_api/render/file/?method=inline&fileID=7C026F7C-746E-4795-90EFCC69B2FB6756