https://www.nao.org.uk/wp-content/uploads/2018/10/The-UK-border-preparedness-for-EU-exit.pdf
https://uk.yahoo.com/news/wales-could-disappear-england-under-213835584.html
https://institute.global/news/brexit-what-we-now-know
https://ecipe.org/wp-content/uploads/2022/02/ECI_22_PolicyBrief-TimeForFresh_01_2022_LY04.pdf