
https://rsf.org/en/ranking_table

https://www.greatbritishpolitics.co.uk/europe/654-dual-nationality-and-the-hurdles-facing-britons-who-want-to-keep-eu-citizenship-after-brexit.html

https://www.gov.uk/guidance/status-of-eu-nationals-in-the-uk-what-you-need-to-know