https://publications.parliament.uk/pa/cm201719/cmselect/cmniaf/329/329.pdf
https://www.vdma.org/v2viewer/-/v2article/render/21059151
https://ec.europa.eu/commission/sites/beta-political/files/outline_of_the_political_declaration.pdf
http://blogs.lse.ac.uk/brexit/2017/08/22/what-does-respecting-the-referendum-result-mean/