https://yougov.co.uk/news/2017/08/01/britain-nation-brexit-extremists/
https://publications.parliament.uk/pa/cm201719/cmselect/cmniaf/329/329.pdf
http://www.fdf.org.uk/news.aspx?article=7834
https://www.brookings.edu/blog/order-from-chaos/2018/01/05/the-brexit-options-explained/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=59815275