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

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

https://ukandeu.ac.uk/wp-content/uploads/2020/03/Parliament-and-Brexit-report.pdf