https://www.kcl.ac.uk/policy-institute/assets/uk-attitudes-to-immigration-1018742pub01-115.pdf
https://www.ons.gov.uk/peoplepopulationandcommunity/populationandmigration/populationestimates/articles/overviewoftheukpopulation/mar2017
https://www.eca.europa.eu/ECAPublications/SR-2024-06/SR-2024-06_EN.pdf
https://www.ips-journal.eu/topics/democracy-and-society/between-human-rights-and-border-control-6860/