https://blogs.lse.ac.uk/brexit/2019/08/12/boris-johnsons-real-agenda-the-singapore-scenario/
https://publications.parliament.uk/pa/cm201719/cmselect/cmintrade/520/520.pdf
https://publications.parliament.uk/pa/bills/cbill/2019-2020/0007/20007.pdf
http://blogactiv.eu/blog/2012/05/15/stumbling-towards-the-brexit/