No, the King cannot be arrested under British law. Sovereign immunity shields the reigning monarch from every form of criminal prosecution and civil lawsuit in UK courts, and the protection applies to his private conduct as well as his official acts as head of state. It lasts for the entire reign. Other members of the Royal Family have no such shield and can be arrested and prosecuted like anyone else.
Where the Immunity Comes From
Sovereign immunity is not written into a single statute you can pull off the shelf. It sits in constitutional convention and common law, built up over centuries. The Guardian summarised the position in 2022: “its origin lies in doctrine and convention, rather than statute, and there is no law setting out the rules underpinning the concept.”
The reasoning is circular by design. Courts in England historically derive their authority from the Crown, so the King cannot be hauled before his own courts as a defendant. In feudal England, lords could not be sued in the courts they controlled, and the King sat above them all with no higher court to answer to. That structure survived into the modern constitution.
The Latin maxim behind it is rex non potest peccare, usually rendered as “the King can do no wrong.” It is not a claim about moral character. It means the law treats the sovereign as legally incapable of committing a wrong the courts can recognise, because law itself flows from the Crown.
What the Immunity Actually Covers
In practical terms, no police officer can arrest the King, no prosecutor can charge him, and no claimant can name him personally in a civil suit. The protection covers:
- Criminal offences of any kind, including anything he might do in a private capacity
- Civil claims in tort, contract, or otherwise
- Being compelled to give evidence in court
That last point was tested in 1911, when King George V faced a bigamy accusation. The Lord Chief Justice ruled that the King could not even be ordered to give evidence. Nothing has displaced that position since.
The British approach is broader than what many other countries give their heads of state. Elsewhere, head-of-state immunity often applies only during the term of office and only to official acts. The reigning British monarch’s immunity is treated as absolute and ongoing for as long as the reign lasts, and it covers private acts alongside public ones.
The Crown Proceedings Act 1947
Until 1947, you could not sue the government at all. The Crown Proceedings Act changed that, opening government departments to civil claims for things like negligence and breach of contract. It deliberately left the monarch’s personal shield in place. Section 40(1) says so directly: “Nothing in this Act shall apply to proceedings by or against, or authorise proceedings in tort to be brought against, His Majesty in His private capacity.”1legislation.gov.uk. Crown Proceedings Act 1947 – Section 40
The Act drew a line the courts still work with. The Crown as a governmental institution (ministers, departments, agencies) can be sued. The individual sitting on the throne cannot. When government action causes harm, the legal target is always the institution, never the person of the monarch.
Specific Legal Exemptions Beyond the General Immunity
On top of the blanket shield, the King is carved out of dozens of individual statutes that bind everyone else. Rather than Parliament debating each new law’s application to the Crown, a convention grew up of writing standard exemption clauses into new legislation. The result is a patchwork of more than 160 individual statutory carve-outs.
- Workers employed directly by the Royal Household cannot bring court claims for race or sex discrimination, or under equal pay law. The monarch is also exempt from the Health and Safety at Work Act 1974.
- The King is exempt from punishment for wildlife offences, environmental pollution, and other environmental crimes. No other private landowner in the country has this kind of blanket protection.
- More than 30 laws bar police from entering private royal estates such as Sandringham and Balmoral without the sovereign’s permission, even to investigate suspected crimes.
- The King does not need a driving licence to drive or a passport to travel abroad. Both are issued in the monarch’s name, so he would in effect be issuing them to himself.
- Under the Road Traffic Regulation Act, the King and other royals travelling under police escort on official business are exempt from speed limits.
Can the King Be Arrested Abroad?
No, not while he is on the throne. Under customary international law, sitting heads of state have absolute immunity from the jurisdiction of foreign courts. The International Court of Justice confirmed this in 2002, holding that head-of-state immunity is absolute for the duration of the office, covers acts done in a private capacity, and even reaches conduct that predated the person taking office. The severity of the alleged conduct does not change the position.
That international protection is tied to holding the office. A former monarch who had abdicated would, in principle, lose it for acts committed in a private capacity. The International Criminal Court is a separate question: its founding treaty asserts jurisdiction over heads of state for genocide, war crimes, and crimes against humanity, but any actual enforcement depends on state cooperation.
Other Royals Can Be Arrested
Sovereign immunity belongs to the reigning monarch alone. The Prince of Wales, the King’s siblings, and every other member of the Royal Family are subject to the law like any other citizen. Protocol shapes how police interact with them, but protocol is not immunity.
Princess Anne became the first senior royal convicted of a criminal offence in 2002. She pleaded guilty under the Dangerous Dogs Act after one of her dogs attacked two children in Windsor Great Park. A Berkshire magistrate fined her £500 and ordered a further £500 in compensation. The case showed the courts treating a non-sovereign royal as an ordinary defendant.
What Would Happen If a King Committed a Serious Crime
Legally, there is no mechanism to arrest or prosecute a sitting monarch. If a King did something serious enough that it could not be left alone, the resolution would be political rather than judicial.
Parliament holds the theoretical power to legislate the immunity away or to alter the line of succession, as it did with the Act of Settlement in 1701 and the Succession to the Crown Act in 2013. In practice, abdication is the more likely route, whether given voluntarily or produced by political pressure. Edward VIII’s abdication in 1936 was not triggered by criminal conduct, but it showed that a monarch can be pushed off the throne once his position becomes politically impossible to hold.
No one can say with confidence how the process would run, because it has never had to. The mechanisms would be improvised in real time, drawing on whatever combination of political pressure, parliamentary action, and constitutional convention the moment called for.