https://rusi.org/sites/default/files/newsbrief_37.3_elliott.pdf
https://ukandeu.ac.uk/wp-content/uploads/2021/06/EU-UK-2030-Report.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/650455/customs_bill_white_paper_print.pdf
http://www.ey.com/Publication/vwLUAssets/EY-UK-EU-Working-through-uncertainty/%24FILE/EY-UK-EU-Working-through-uncertainty-considerations-for-Financial-Institutions.pdf