
https://www.iod.com/Portals/0/PDFs/Campaigns%20and%20Reports/Europe%20and%20trade/IoD-Customising-Brexit.pdf?ver=2018-02-15-083137-800

https://publications.parliament.uk/pa/cm201719/cmselect/cmbeis/380/380.pdf

http://blogs.sussex.ac.uk/uktpo/files/2017/11/Briefing-Paper-11.pdf