https://www.gov.uk/government/publications/information-about-the-withdrawal-bill
http://www.reuters.com/article/us-britain-eu-verhofstadt-idUSKBN19V0WP
http://foodresearch.org.uk/wp-content/uploads/2016/03/Food-and-Brexit-briefing-paper-2.pdf
http://www.res.org.uk/view/art4Apr17Features.html