https://blogs.lse.ac.uk/brexit/2019/08/12/boris-johnsons-real-agenda-the-singapore-scenario/
https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_Brexit_customs_WEB.pdf
https://cerre.eu/wp-content/uploads/2024/01/CERRE.BOOK_.DMA_.17JAN.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