Columbia subject headings:
Great Britain--Emigration and immigration--Government policy.
Great Britain--Politics and government--1979-1997.
Harvard subject headings:
Great Britain--Emigration and immigration--Government policy--History--20th century.
Great Britain--Emigration and immigration--Government policy.
Great Britain--Politics and government--1979-1997.
Princeton subject headings:
Great Britain--Emigration and immigration--Government policy.
Great Britain--Politics and government--1979-1997.