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

https://www.publications.parliament.uk/pa/cm201617/cmselect/cmexeu/1125/1125.pdf

https://www.brookings.edu/opinions/venezuelas-refugee-crisis-will-exceed-syrias-we-must-help/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=60754413