Head of state
From Tardis Wiki, the free Doctor Who reference
In 2006, following the crash of the Slitheen craft in Westminster, the British Royal Family were evacuated, leaving the United Kingdom with no head of state. (TV: Aliens of London)
Urbinia made no distinction between education and political power. As a result, the chancellor of the university in Kiria City also acted as the head of state. (AUDIO: Daughter of the Gods)