https://blogs.lse.ac.uk/brexit/2019/10/15/the-curve-of-inequality-and-the-brexit-way/
https://eupinions.eu/index.php?id=12463
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/621848/60093_Cm9464_NSS_SDR_Web.pdf
https://rusi.org/sites/default/files/briefingpaper-france-uk-2017.pdf