https://rusi.org/sites/default/files/newsbrief_37.3_elliott.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/665871/December_-_Joint_technical_note_on_the_comparison_of_EU-UK_positions_on_citizens__rights.pdf
https://ec.europa.eu/commission/sites/beta-political/files/use-data-protection-information_en.pdf
https://blogs.lse.ac.uk/brexit/2021/02/26/future-british-european-security-relations-are-a-matter-of-trust/