
https://www.publications.parliament.uk/pa/cm201617/cmselect/cmbeis/909/909.pdf

https://theconversation.com/why-the-eus-singapore-ruling-does-not-lead-to-a-smoother-brexit-road-for-britain-78116

https://ukandeu.ac.uk/wp-content/uploads/2021/03/Freeports.pdf