Bizarre British Laws That Have Never Been Repealed

Britain’s long legal history has left behind a trail of weird and wonderful laws—some so outdated they read like a Monty Python sketch. While many of them are ignored or quietly unenforced, they technically still exist. They’ve never been repealed, never officially struck from the books, and in some cases, still sit in dusty statute rolls just waiting to be challenged. So if you’ve ever wondered whether it’s illegal to handle salmon suspiciously or if you’re allowed to wear a suit of armour inside Parliament, here’s a look at the strangest British laws that are still hanging around.

It’s illegal to wear a suit of armour in Parliament.

According to the 1313 Statute Forbidding Bearing of Armour, no one is allowed to enter Parliament in a suit of armour. This law was meant to stop barons and nobles from intimidating lawmakers during medieval debates. Even though chainmail and breastplates are hardly common attire these days, the law has never been repealed.

While it’s unlikely you’d be arrested for donning a suit of armour today, technically you could be asked to leave. This obscure statute is often cited in trivia and legal blogs, and it’s one of those historic relics that show just how much feudal Britain shaped the early workings of government.

Handling salmon suspiciously is still against the law.

Under Section 32 of the Salmon Act 1986, it’s illegal in England and Wales to “handle salmon in suspicious circumstances.” The law was introduced to tackle fish poaching and black-market sales, but the wording is so vague it’s become the stuff of legal legend.

You’re unlikely to be prosecuted just for looking a bit dodgy with a fish in your hand, but the law technically allows enforcement officers to investigate anyone suspected of illegally obtaining or trading salmon. The phrasing is so infamous that it often makes media lists of the most bizarre laws.

It’s illegal to beat or shake your carpet in the street.

According to section 60 of the Metropolitan Police Act 1839, it’s unlawful to beat or shake any carpet, rug, or mat in the street (doormats are allowed, but only before 8am). The law was intended to reduce public nuisance and improve sanitation in Victorian London—but it was never repealed, and technically applies to parts of the UK to this day.

This particular law is rarely enforced, but if you were to start shaking out your Persian rug in a busy street, a particularly meticulous officer might have grounds to raise an eyebrow—or more.

Knocking on a door and running away is a punishable offence.

Many of us remember the childhood prank of knocking on someone’s door and scarpering. But under the Town Police Clauses Act 1847, it’s actually illegal to “wilfully and wantonly disturb any inhabitant by pulling or ringing any doorbell or knocking at any door without lawful excuse.”

While most kids get away with a warning or a telling-off, the law technically allows for fines or even prosecution. It’s just another example of how Victorian lawmakers weren’t here for anyone’s nonsense.

It’s still an offence to be drunk in charge of a cow.

According to the Licensing Act 1872, being “drunk while in charge of a carriage, horse, cattle or steam engine” is against the law. That’s right—you can’t be under the influence while handling a cow. It may sound absurd today, but it was introduced to keep roads and footpaths safe back when animals powered transport and heavy machinery.

While steam engines aren’t exactly a modern hazard, and you’re unlikely to see someone herding cows through central Birmingham, the law still technically applies. And being drunk in charge of any kind of vehicle, of course, remains a serious matter.

You can’t import potatoes from Poland without permission.

Under the Potato Order 2004, it is illegal to import potatoes from Poland into England without prior notice. The law was introduced to stop the spread of ring rot, a serious plant disease that can devastate potato crops.

While this sounds incredibly specific, it’s a very real regulation enforced under the Plant Health Act 1967. You won’t be fined for enjoying pierogi at your Polish gran’s house, but commercial traders do need to comply. You can still view this law on the legislation.gov.uk website, where it’s filed under plant health regulations.

It’s technically illegal to die in the Houses of Parliament.

One of the most famous “bizarre British laws” claims that dying in Parliament is illegal because the deceased would be entitled to a state funeral. The problem? There’s no actual written law confirming this. It’s likely a persistent myth, yet it appears regularly on unofficial lists.

In fact, the UK government once had to clarify that no such law exists. In a 2007 response, Parliament confirmed this was simply a widely shared urban legend. So if you’re planning on keeling over during a tour, at least you’re not breaking any laws.

It’s illegal to keep a pet pig named Napoleon.

While not technically British in origin, this odd one was often cited in old British trivia lists, thanks to George Orwell’s Animal Farm. The claim is that under old French law (sometimes repeated in jest across the Channel), naming a pig Napoleon was illegal as a form of disrespect. British publications picked it up in the 20th century as a quirky fact, but there’s no confirmed law on the UK statute books banning porcine Napoleons.

That said, defacing currency or insulting foreign heads of state can still cause legal headaches in some diplomatic scenarios, so it’s not entirely out of the realm of legal history.

It’s illegal to gamble in a library.

The Library Offences Act 1898 is still in force today. It makes it illegal to gamble, swear, use obscene language, or behave in a disorderly manner inside a public library. While few people are likely to set up a poker table between the shelves, the law still exists and could be enforced in theory.

This one is less bizarre in intent—just very specific. It reflects a time when public spaces were governed by strict behavioural codes, many of which have quietly stuck around.

You can’t handle a whale without royal permission.

Under a law from the reign of Edward II (1324), any whale or sturgeon found off the coast of Britain technically belongs to the monarch. These are classified as “royal fish.”

The law was originally about preserving valuable resources—whale blubber and sturgeon roe were considered delicacies. While modern conservation laws have overtaken this medieval statute, the legal ownership still technically rests with the Crown. The UK Parliament website explains how this rule occasionally still pops up when a whale washes ashore.

Moths can’t be chased inside the Houses of Parliament.

There’s no official legislation specifically banning moth-chasing, but this one came from a misinterpretation of rules about maintaining decorum inside the chamber. MPs and Lords mustn’t behave in a way that disrupts proceedings—and flapping around after a moth would certainly qualify.

While it’s not a formal law you’d be prosecuted for breaking, Parliamentary tradition is as binding in some ways as written rules. So if you ever find yourself in Westminster with an urgent need to swat an insect, maybe think twice.

Britain’s legal system is complex and ancient, and it shows.

Many of these laws serve as curiosities more than practical regulations. Still, they remind us how much our society—and our sense of what needs policing—has changed. Some were passed to manage real concerns of the time, others to control public order, and a few are simply head-scratchers from a very different era.

While they’re unlikely to land anyone in serious trouble today, they remain a fascinating glimpse into the country’s evolving relationship with law, order and common sense.