At a time of political upheaval and economic stagnation, Andy Burnham will on Monday become the seventh prime minister in a decade.

© PA Images, via Reuters

At a time of political upheaval and economic stagnation, Andy Burnham will on Monday become the seventh prime minister in a decade.

© PA Images, via Reuters

A plain-spoken politician from a modest background in northwest England, Mr. Burnham became Labour leader — and Britain’s incoming prime minister — on Friday.

© Jon Super/Associated Press