https://www.kcl.ac.uk/policy-institute/assets/uk-attitudes-to-immigration-1018742pub01-115.pdf
https://ec.europa.eu/eurostat/web/products-eurostat-news/w/ddn-20250711-1
https://www.ajot.com/news/the-brexit-checklist-where-the-u.k.-and-eu-currently-stand
http://ourglobalfuture.com/wp-content/uploads/2017/05/Global-Future-The_case_for_immigration.pdf