http://www.nhsconfed.org/-/media/Confederation/Files/public-access/Securing-the-future.pdf?dl=1
http://carnegieeurope.eu/2017/06/15/bringing-brexit-back-to-reality-pub-71262
https://www.gov.uk/government/publications/information-about-the-withdrawal-bill
https://rusi.org/sites/default/files/briefingpaper-france-uk-2017.pdf