http://www.europarl.europa.eu/RegData/etudes/IDAN/2017/599352/EPRS_IDA%282017%29599352_EN.pdf
http://carnegieeurope.eu/2017/06/15/bringing-brexit-back-to-reality-pub-71262
https://labour.org.uk/wp-content/uploads/2022/12/Commission-on-the-UKs-Future.pdf