https://www.socialeurope.eu/wp-content/uploads/2018/05/BP1-Devolution.pdf
https://onlinelibrary.wiley.com/doi/epdf/10.1111/jcms.13386
https://publications.parliament.uk/pa/cm201719/cmselect/cmbeis/379/379.pdf
https://www.bloomberg.com/news/articles/2017-06-14/ryanair-easyjet-say-soft-brexit-won-t-address-airline-concerns?cmpid=BBBXT061517_BIZ&utm_medium=email&utm_source=newsletter&utm_term=170615&utm_campaign=brexit