The turnover of prime ministers has speeded up in recent decades.
Data analysis
Sunak enjoys fastest journey from MP to PM in modern era
He became a member of parliament only seven years ago.
New Tory prime minister faces biggest Labour poll lead in 25 years
One recent survey put Labour 39 points ahead of the Tories.
Sunak would be youngest UK prime minister in modern political history
The 42-year-old would also be the country’s first non-white PM.