https://www.bloomberg.com/news/articles/2017-08-25/brexit-bulletin-when-silence-isn-t-golden
https://ec.europa.eu/commission/sites/beta-political/files/joint_report.pdf
https://www.vdma.org/v2viewer/-/v2article/render/21059151
http://blogs.lse.ac.uk/politicsandpolicy/john-mills-ge2017/