http://fedtrust.co.uk/brexit-a-meaningful-vote-for-mps-implies-a-meaningful-vote-for-the-people/
https://blogs.lse.ac.uk/brexit/2019/08/12/boris-johnsons-real-agenda-the-singapore-scenario/
https://ec.europa.eu/commission/sites/beta-political/files/slides_on_uk_technical_note_on_temporary_customs_arrangements.pdf
https://apps.eui.eu/EUI_API/EVENTSV2/Attachments/Index?id=22316