http://www.sussex.ac.uk/spru/newsandevents/2017/publications/food-brexit
https://www.gov.uk/government/news/david-davis-speech-at-ubs
https://www.friendsofeurope.org/sites/default/files/media-files/uk_report_web.pdf
https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/129/129.pdf