Britain is a constitutional monarchy, which means it has a king who is head of state and almost no power at all. Understanding how those two things sit together is the key to understanding a great deal about how the country works.
Reigns but does not rule
On paper the monarch’s powers are enormous: appointing the prime minister, dissolving Parliament, granting assent to legislation, declaring war, commanding the armed forces. In practice every one of these is exercised on the advice of elected ministers, and refusing would provoke a constitutional crisis rather than a change of policy.
Royal assent — the monarch’s signature turning a bill into law — has not been refused since Queen Anne in 1708. It is now a formality performed by commissioners; the King does not even attend.
What the monarch actually does
- Appoints the prime minister — in practice, whoever can command a majority in the Commons.
- Opens Parliament and reads the King’s Speech, which is written entirely by the government.
- Holds a weekly audience with the prime minister — private, unminuted, and the one place a PM can speak entirely off the record to someone with decades of institutional memory.
- Represents Britain abroad on state visits.
- Is Head of the Commonwealth, and head of state of fourteen other realms including Canada, Australia and New Zealand.
The unwritten constitution
Britain has no single written constitution. The rules are a mixture of statute, common law, precedent and convention — and conventions are not legally enforceable, they are simply things everyone agrees to do. The system depends on all parties behaving as expected, which works remarkably well until somebody declines to.
The classic formulation is Walter Bagehot’s, from 1867: the monarch has three rights — the right to be consulted, the right to encourage, and the right to warn. That is still, essentially, the job.
The eleven-year gap
The monarchy is not quite unbroken. Charles I was tried and beheaded in 1649 after losing the Civil War, and Britain spent eleven years as a republic under Oliver Cromwell, who took the title Lord Protector and ruled with considerably less restraint than the king he replaced. Christmas was among the things banned. The monarchy was restored in 1660 under Charles II, and Cromwell’s body was dug up and posthumously executed, which gives some idea of how the experiment was remembered.
Arguments for and against
Supporters point to political neutrality, continuity, tourism and soft power, and to the fact that a head of state above party politics is a genuine asset in a crisis. Opponents point to hereditary privilege, cost, secrecy and the sheer oddness of an unelected head of state in a democracy. Both cases are stronger than either side usually admits.