Columbia subject headings:
Harvard subject headings:
Great Britain--Politics and government--20th century.
Labor laws and legislation--Great Britain
Labor movement--Great Britain--History--20th century.
Labor policy--Great Britain--History--20th century.
Labor unions--Great Britain--History--20th century.
Labor unions--Law and legislation--Great Britain.
Princeton subject headings:
Great Britain--Politics and government--20th century.
Labor laws and legislation--Great Britain.
Labor movement--Great Britain--History--20th century.
Labor policy--Great Britain--History--20th century.