
https://www.gov.uk/government/news/programme-for-fourth-round-of-uk-eu-article-50-negotiations

https://blogs.lse.ac.uk/brexit/2019/08/12/boris-johnsons-real-agenda-the-singapore-scenario/

https://www.publications.parliament.uk/pa/ld201617/ldselect/ldeucom/116/116.pdf