https://www.conservativehome.com/parliament/2018/07/our-brexit-plan-takes-back-control-of-money-laws-and-borders-and-heres-how-may-and-raabs-letter-to-conservative-mps.html
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/502291/54284_EU_Series_No1_Web_Accessible.pdf