http://fedtrust.co.uk/views-from-the-federal-trust/free-movement-and-migration/
https://www.opendemocracy.net/uk/brexitinc/james-cusick-adam-ramsay-crina-boros/revealed-tory-mps-using-taxpayers-cash-to-fund-sec?utm_source=Daily+Newsletter&utm_campaign=bd60eeeba0-DAILY_NEWSLET
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/635900/2017-08-07_DP_Bill_-_Statement_of_Intent.pdf
https://ukandeu.ac.uk/wp-content/uploads/2022/10/UKICE-Northern-Ireland-Protocol-Bill.pdf