https://publications.parliament.uk/pa/cm201719/cmselect/cmbeis/380/380.pdf
http://fedtrust.co.uk/views-from-the-federal-trust/free-movement-and-migration/
https://www.rte.ie/news/analysis-and-comment/2017/1117/920981-long-read-brexit/?utm_source=POLITICO.EU&utm_campaign=693f844ad1-EMAIL_CAMPAIGN_2017_11_20&utm_medium=email&utm_term=0_10959edeb5-693f844ad1-189647205
https://unherd.com/2021/12/what-hope-for-the-united-kingdom/