https://www.instituteforgovernment.org.uk/explainers/eu-withdrawal-bill-amendments-and-debates
https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/365/36503.htm
https://www.socialeurope.eu/2017/07/road-soft-brexit/
http://www.lawsociety.org.uk/news/stories/leaving-in-an-orderly-fashion-our-approach-to-brexit/