https://uk.yahoo.com/news/wales-could-disappear-england-under-213835584.html
https://ec.europa.eu/commission/commissioners/2014-2019/andriukaitis/blog/likening-eu-ussr-not-unreasonable_en
https://economy2030.resolutionfoundation.org/wp-content/uploads/2023/06/Trading-Up.pdf
https://ec.europa.eu/commission/sites/beta-political/files/revised_withdrawal_agreement_including_protocol_on_ireland_and_nothern_ireland.pdf