IMMIGRATION
BORDER CONTROLS
INTERNATIONAL MIGRATION
POPULATION MIGRATION
IMMIGRANTS
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FREEDOM OF MOVEMENT
HASSET
ILLEGAL ALIENS
TERM CREATED JUNE 1998. PREVIOUSLY THE BROADER CONCEPT 'IMMIGRANTS' WOULD HAVE BEEN USED.
<a href='https://beta.ukdataservice.ac.uk/datacatalogue/studies/?Search=Keyword:ILLEGAL+IMMIGRANTS'>Search for 'ILLEGAL IMMIGRANTS' in UK Data Service Catalogue</a>
ILLEGAL IMMIGRANTS