Knife crime is a major concern in England, and rules have become stricter in recent years. While legislation has not changed dramatically, it is now applied more quickly and with less leniency. Understanding what you can legally carry and the consequences is important.
In England, carrying a knife around in public is against the law. These rules are governed by the Criminal Justice Act 1988 and the Offensive Weapons Act 2019, both of which are still important in 2026. These laws cover all public spaces, including streets, parks, vehicles, and even shared spaces in buildings.
“Carrying” does not just mean holding a knife. If it is in your bag, car or pocket, you are still considered to have it and unless your knife fits a specific legal category or you have a valid reason, you might be breaking the law.
What knives are illegal?
Some knives are completely banned in the UK, regardless of why you have them. These include:
Flick knives and switchblades
Butterfly knives
Disguised blades
Zombie knives and certain large machetes
Enforcement has tightened around large or aggressive-looking weapons, even if the exact definition is unclear. Police and courts are now more likely to judge a knife by whether it appears made for violence. Having these knives is illegal in public and at home, and penalties are strict.
Are any knives legal to carry?
A legal everyday knife falls under a narrow exception. The following knives can be carried without giving a reason if:
The blade is folding (non-locking).
The cutting edge is 3 inches (7.62 cm) or less.
Context and intent are as important as size, and even carrying a small knife in a threatening way can make it illegal.
What is a “good reason”?
If your knife does not fit the legal exception, you need a good reason for carrying it. This can be used as a legal defence, but it does not guarantee you will avoid trouble.
Examples include:
Work purposes (e.g. tools for tradespeople)
Religious reasons (such as carrying a kirpan)
National dress (e.g. traditional Scottish attire)
It is your responsibility to prove your reason. Saying you carried a knife “just in case” or for self-defence is not accepted. Courts are stricter and will look carefully at where you were, what you were doing, and if your explanation is reasonable.
Police stop & search powers
Police can stop and search people if they think someone is carrying a weapon. Section 60 powers also allow officers to stop people in, even without a specific reason.
Police are using these powers more often because of rising knife crime. Knife Crime Prevention Orders (KCPOs) are also used more, and they can stop people from carrying knives or going to certain places, sometimes even if the person has not been convicted.
Penalties and sentencing
Penalties for knife offences are strict and are enforced regularly:
Up to 4 years’ imprisonment for possession
Mandatory prison sentences for repeat offences
Harsher penalties if the knife is used to threaten or harm
Sentencing rules now focus on discouraging knife crime. Even people caught for the first time can face serious consequences, especially if the knife is seen as dangerous or the situation raises concerns.
Common mistakes to avoid
Many people charged with knife offences did not know they were breaking the law. Some common mistakes are:
Leaving a knife in a bag or car unintentionally
Carrying work tools outside of working hours
Assuming a small knife is always legal
Claiming self-defence as a justification
The law is concerned with having a knife, not just what you plan to do with it. You can be charged even if you do not use the knife.
FAQs
Can I carry a knife for self-defence?
No. Self-defence is not considered a valid reason under UK law.
Is it legal to keep a knife in my car?
Only if you have a valid reason. Otherwise, it may count as illegal possession.
What is the maximum sentence?
Up to 4 years in prison, with stricter consequences for repeat offences.
Are small knives always legal?
No. They must meet strict criteria, and how they are carried matters.
Can police search me without a reason?
Yes, in certain areas under Section 60 powers, which are increasingly used.
