https://publications.parliament.uk/pa/cm201719/cmselect/cmexeu/935/935.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/638958/Continuity_in_the_availability_of_goods_for_the_EU_and_the_UK_Position_Paper.pdf
https://ec.europa.eu/commission/presscorner/api/files/attachment/867751/NA0620220ENN_002.pdf
https://rusi.org/sites/default/files/briefingpaper-france-uk-2017.pdf