https://www.gov.uk/guidance/status-of-eu-nationals-in-the-uk-what-you-need-to-know
http://www.epc.eu/documents/uploads/pub_7865_realitybites.pdf
https://www.esri.ie/system/files/publications/SUSTAT117.pdf
https://www.tandfonline.com/doi/epdf/10.1080/01402382.2023.2168945?needAccess=true&role=button