Under UK law, it has long been an offence to possess an offensive weapon in a public place without reasonable excuse. However, in 2019 Parliament enacted the Offensive Weapons Act 2019, which significantly extended the scope of this offence by criminalising the possession of certain offensive weapons in private places. These provisions came into force on 14 July 2021.
As a result of these changes, it is now a criminal offence to possess many weapons that were previously legal to own in private, including items such as knuckledusters and flick knives. The offence carries a potential sentence of up to 51 weeks’ imprisonment. More recently, further amendments in 2024 and 2025 have expanded the list of prohibited items to include zombie knives and ninja swords. These restrictions do not apply to ordinary household items such as kitchen knives or scissors when possessed in a private place.
Although the legislation was introduced as a deterrent to the private ownership of offensive weapons, many people remain unaware of the changes. As a result, individuals can find themselves unexpectedly charged and brought before the courts. There are very limited defences available to a charge of possessing an offensive weapon in a private place. While narrow exceptions may apply, for example in cases of historical re-enactment, the offence is largely one of strict liability. Simply forgetting that you owned or possessed the weapon does not amount to a defence.
These legislative changes have also led to tighter controls on the online sale of bladed weapons, placing greater responsibility on retailers and delivery companies. Purchasers are now required to verify that they are 18 years of age or over, using methods such as credit checks or age-verification systems. Bladed items must be clearly labelled, proof of age is required upon delivery, and such items cannot be delivered to lockers or automated collection points. These measures have been introduced to address the growing issue of online sales of bladed weapons.
From 1 August 2025, the law went further by prohibiting not only the possession of ninja swords, but also their sale and manufacture. This reflects ongoing efforts to tackle the rising levels of violence associated with offensive weapons.
If you currently possess an offensive weapon, it is advisable to surrender the item to your local police station. The weapon should be securely wrapped to prevent injury and taken directly to the station during daylight hours and normal working times.
If you are to be interviewed by the police, or charged with possession of an offensive weapon in a private place, our team is available to provide expert legal advice and representation.
If you wish to discuss any of the above, please contact our Crime team below or call us on 01702 338338.
