https://institute.global/news/tony-blair-parliaments-duty-brexit
http://www.cer.org.uk/sites/default/files/insight_js_st_9.6.17.pdf
https://ec.europa.eu/commission/sites/beta-political/files/financial-settlement-essential-principles-draft-position-paper_en.pdf
https://www.bloomberg.com/news/features/2021-09-02/food-prices-driven-up-by-global-worker-shortage-brexit