
https://www.spectator.co.uk/article/full-text-top-uk-brexit-negotiator-david-frost-on-his-plans-for-an-eu-trade-deal

https://www.iod.com/Portals/0/PDFs/Campaigns%20and%20Reports/Europe%20and%20trade/Business-of-Brexit.pdf?ver=2017-05-22-090428-150

https://blogs.lse.ac.uk/brexit/2020/03/09/brexit-is-a-policy-fiasco-were-voters-deceived-during-the-referendum/