https://www.gov.uk/government/news/david-davis-speech-to-the-suddeutsche-zeitung-economic-summit
https://www.esri.ie/system/files/publications/QEC2019SPR_SA_Bergin.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/652285/Joint_Ministerial_Committee_communique.pdf
https://blogs.sussex.ac.uk/uktpo/2018/12/17/organising-the-second-referendum/