http://europa.eu/rapid/press-release_IP-18-463_en.htm
https://blogs.sussex.ac.uk/uktpo/2017/06/12/disentangling-brexit-trade-politics-and-policies/
http://www.icaew.com/-/media/corporate/files/technical/economy/brexit/eu-exit-charge.ashx
https://www.britishcouncil.org/sites/default/files/the_value_of_trust.pdf