
http://www.niesr.ac.uk/sites/default/files/publications/NIESR%20GE%20Briefing%20Paper%20No.%204%20-%20Agriculture%20in%20the%20UK_0.pdf

http://blogs.lse.ac.uk/brexit/2018/07/09/british-influence-in-brussels-had-been-far-greater-than-recognised/

https://ec.europa.eu/commission/sites/beta-political/files/slides_on_uk_technical_note_on_temporary_customs_arrangements.pdf