https://publications.parliament.uk/pa/ld201719/ldselect/ldconst/69/69.pdf
http://www.russellgroup.ac.uk/media/5521/rg-international-students-june-2017.pdf
http://www.oliverwyman.com/content/dam/oliver-wyman/v2/publications/2018/march/Oliver-Wyman_Clifford-Chance-The-Red-Tape-Cost-of-Brexit.pdf
https://www.socialeurope.eu/2017/07/brexit-to-nowhere/