Columbia subject headings:
Harvard subject headings:
Forced labor--Great Britain--History--21st century.
Foreign workers--Legal status, laws, etc.--Great Britain.
Refugees--Legal status, laws, etc.--Great Britain.
Princeton subject headings:
Emigration and immigration law--England.
Forced labor--England--History--21st century.
Foreign workers--Legal status, laws, etc.--England.
Refugees--Legal status, laws, etc.--England.