
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/899991/200713_BPDG_-_Border_Operating_Model_FINAL_1320_edit.pdf

https://blogs.sussex.ac.uk/uktpo/2018/02/15/sustainability-impact-assessment-for-post-brexit-britain/

https://blogs.lse.ac.uk/europpblog/2023/03/13/what-impact-have-eu-sanctions-had-on-the-russian-economy/