Columbia subject headings:
Harvard subject headings:
European Union countries--Foreign relations--Great Britain.
European Union--Great Britain.
European Union--Membership.
Great Britain--Foreign relations--European Union countries.
Great Britain--Politics and government--2007-
United States--Politics and government--2017-2021
Princeton subject headings:
European Union countries--Foreign relations--Great Britain.
European Union--Great Britain.
European Union--Membership.
Great Britain--Foreign relations--European Union countries.
Great Britain--Politics and government--2007-
United States--Politics and government--2017-.