Foreign Secretary
From Conservapedia
The Foreign Secretary - in full, Secretary of State for Foreign and Commonwealth Affairs - is the foreign minister of the Government of the United Kingdom. The post is considered - alongside that of Home Secretary and Chancellor of the Exchequer to be one of the three main offices of state below Prime Minister. Only one person - James Callaghan - held all three posts and went on to be PM.
The current Foreign Secretary is William Hague.