https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef1711en.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/662744/State_of_the_Nation_2017_-_Social_Mobility_in_Great_Britain.pdf
http://www.britishchambers.org.uk/press-office/press-releases/bcc-firms-invest-in-local-labour-but-still-need-foreign-skills-to-plug-shortages.html
https://www.resolutionfoundation.org/app/uploads/2020/01/Dead-end-relationship.pdf