http://www.sussex.ac.uk/spru/newsandevents/2017/publications/food-brexit
http://www.fdf.org.uk/news.aspx?article=8062
https://bdi.eu/media/user_upload/20171005_Pressemitteilung_Brexit.pdf
https://blogs.lse.ac.uk/brexit/2021/05/17/brexit-is-a-political-ponzi-scheme/