Columbia subject headings:
European Union countries--Foreign relations--Great Britain.
European Union--Great Britain.
Great Britain--Foreign relations--European Union countries.
Harvard subject headings:
European Union countries--Foreign relations--Great Britain.
European Union--Great Britain.
Great Britain--Foreign relations--European Union countries.
Princeton subject headings:
European Union countries--Relations--Great Britain.
European Union--Great Britain.
European Union--Membership.
Great Britain--Relations--European Union countries.
Law--Great Britain--Forecasting.
Referendum--Great Britain--History--21st century.