http://www.europarl.europa.eu/RegData/etudes/STUD/2017/602028/IPOL_STU(2017)602028_EN.pdf
http://www.fdf.org.uk/news.aspx?article=7834
https://uk.yahoo.com/news/wales-could-disappear-england-under-213835584.html
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/704057/Policy_Note_-_Exceptions_and_Licences.pdf