http://www.europarl.europa.eu/RegData/etudes/IDAN/2017/599352/EPRS_IDA%282017%29599352_EN.pdf
https://ukandeu.ac.uk/universities-and-brexit-past-present-and-future/#
https://ukandeu.ac.uk/the-windsor-framework-where-have-all-the-rebels-gone/
https://publications.parliament.uk/pa/cm201719/cmselect/cmhaff/421/421.pdf