https://www.nao.org.uk/wp-content/uploads/2018/10/The-UK-border-preparedness-for-EU-exit.pdf
https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_Brexit_dispute_resolution_WEB.pdf
https://www.gov.uk/government/publications/information-about-the-withdrawal-bill
https://ukandeu.ac.uk/wp-content/uploads/2021/09/Global-Britain-views-from-abroad.pdf