https://www.socialeurope.eu/brexit-can-be-stopped-but-the-window-of-opportunity-is-closing-fast
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/682894/Draft_Text_for_Discussion_-_Implementation_Period__1_.pdf
https://infacts.org/theresa-mays-flip-flops-u-turns/
https://www.publications.parliament.uk/pa/cm201617/cmselect/cmintrade/817/817.pdf