https://www.nuffieldtrust.org.uk/resource/getting-a-brexit-deal-that-works-for-the-nhs
https://www.ilo.org/media/545771/download
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/974507/20210331_-_CRED_Report_-_FINAL_-_Web_Accessible.pdf
https://arxiv.org/ftp/arxiv/papers/2004/2004.01014.pdf