https://publications.parliament.uk/pa/cm201719/cmselect/cmpubacc/401/401.pdf
http://www.wsta.co.uk/images/Brexit/Brexit_FINAL.pdf
https://ec.europa.eu/commission/presscorner/api/files/document/print/en/ip_22_1511/IP_22_1511_EN.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/655232/DExEU_ARA_v5.0_amended_version_14.08.17__1_.pdf