It is now an offence to possess certain items such as knuckledusters, throwing stars and zombie knives.
It's a result of new changes to legislation brought about by the Offensive Weapons Act 2019.
Other sections of the act include an updated definition of flick knives to reflect changes in weapon designs, and the banning of private possession of flick knives and gravity knives.
The rest of the act will commence later in the year, and will bring in new provisions for the control of goods sold online, as well as placing responsibility onto delivery companies to conduct age verification at delivery stage.
Police and partners will be working to educate the public and the business community regarding changes in legislation. The introduction of such measures will provide police with further means to help deter young people from becoming involved in knife possession and knife crime.
National Police Chiefs' Council lead on knife crime, Deputy Assistant Commissioner Graham McNulty, said:
“The harm caused to families and communities through the tragic loss of life relating to knife crime is devastating and that is why focusing on this issue remains a top priority for policing.
“We welcome the changes to legislation being introduced by the Offensive Weapons Act. These measures will help officers to take dangerous weapons off the streets, deal with those intent on using them to cause harm and suffering, and crucially, make it more difficult for young people to get hold of knives and other dangerous items in the first place.
“Knife crime is not something that can be solved by policing alone. We are working with businesses, schools, charities and community schemes to educate young people and explain why carrying a knife is never the right choice. This early intervention plays a vitally important role in stopping young people from turning to a life of crime.”
Hampshire Constabulary’s Lead for Knife Crime, Chief Inspector John Halfacre, said:
“Our commitment to tackling knife crime remains a priority throughout the whole year, as we continue to work to identify those involved, address the root causes of this type of crime, educate our communities, provide preventative advice and ensure those carrying and using weapons are brought to justice.
“The update in the Offensive Weapons Act 2019 should considerably reduce the risk to our communities from the threat, harm and risk these weapons do and can pose, especially when used in criminality.
"I’m confident this will help to change the mind-set of those young people in our communities who may have otherwise thought about owning an offensive weapon.
“Fortunately, the vast majority of the public don't carry knives or a weapon but if you are involved in knife crime, I urge you to reflect and make positive change for yourself, your family, and your community, because the impact of knife crime can be truly devastating.
"I would also like to encourage our communities to play their part in helping us tackle this issue. Please share our knife crime message, talk openly with family members and friends and report any concerns you have.”