http://www.britishchambers.org.uk/Workforce%20Survey%202017%20-%20Skills%20shortages.pdf
http://openeurope.org.uk/today/blog/will-brexit-ground-flights-europe/
http://ec.europa.eu/newsroom/just/item-detail.cfm?item_id=607452
http://www.icaew.com/-/media/corporate/files/technical/economy/brexit/eu-exit-charge.ashx