
https://ec.europa.eu/commission/sites/beta-political/files/citizens-rights-essential-principles-draft-position-paper_en.pdf

https://blogs.lse.ac.uk/brexit/2020/10/01/churchill-the-european-has-been-written-out-of-history/#comments

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/695321/An_inspection_of_exit_checks.pdf