https://blogs.sussex.ac.uk/uktpo/2018/02/15/sustainability-impact-assessment-for-post-brexit-britain/
https://www.gov.uk/guidance/status-of-eu-nationals-in-the-uk-what-you-need-to-know
https://institute.global/sites/default/files/2020-07/Tony%20Blair%20Institute%2C%20A%20Path%20to%20Brexit%20Agreement%2C%20July%202020.pdf