https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/63/63.pdf
https://blogs.lse.ac.uk/brexit/2018/10/30/after-brexit-the-uk-should-be-able-to-re-enter-the-eu-if-it-wishes-to-do-so/
https://ec.europa.eu/commission/sites/beta-political/files/seminar-20200114-lpf_en.pdf
https://yougov.co.uk/news/2017/04/26/voting-intention-conservatives-45-labour-29-25-26-/