https://www.politico.eu/wp-content/uploads/2021/11/02/Coercion.pdf
http://trade.ec.europa.eu/doclib/docs/2018/october/tradoc_157469.pdf
http://visual.ons.gov.uk/trading-places-uk-goods-trade-with-eu-partners/
https://www.bloomberg.com/news/articles/2019-09-11/world-s-oldest-customs-union-and-u-k-reach-a-post-brexit-deal