The Legal Consequences of Knife Crime: A Guide for Young People and Families
What the law actually says about knife possession, threats and use, and the lifelong impact a conviction can have.
Important
This article provides general legal information only, not legal advice. If your child has been arrested, contact a solicitor immediately. Children are entitled to free legal representation.
UK Knife Law: What is Illegal?
Under the Criminal Justice Act 1988 and the Offensive Weapons Act 2019 , it is a criminal offence in England and Wales to:
- Carry a bladed or sharply pointed article in a public place (this includes kitchen knives)
- Carry a knife within a school or college: this is a more serious offence
- Use a knife to threaten or harm another person
- Carry a knife even if you claim it is for your own protection
There are limited exemptions (e.g., a folding penknife with a blade under 3 inches for work purposes), but courts take a strict view.
Sentences and Penalties
| Offence | Maximum Sentence (adult) |
|---|---|
| Possession of bladed article in public | 4 years' imprisonment |
| Possession on school premises | 4 years + mandatory minimum for repeat offence |
| Threatening with a bladed article | 4 years (6 months mandatory minimum for second offence) |
| Wounding / grievous bodily harm | Life imprisonment |
The Offensive Weapons Act 2019 introduced mandatory minimum sentences of at least 6 months for a second offence of threatening with a bladed article (16 and over).
What Happens If a Young Person Under 18 Is Caught?
Young people aged 10, 17 can be arrested and prosecuted. The Youth Justice System applies, but this does not mean there are no serious consequences:
- Reprimand or final warning : used for first or minor offences (replaced by Youth Cautions in 2013)
- Youth Rehabilitation Order (YRO) , community requirements, curfew, or supervision
- Detention and Training Order (DTO) : a custodial sentence for serious or repeat offences
- Long-term detention : imposed for the most serious offences (equivalent to adult sentences)
The Long-Term Impact of a Criminal Record
Even minor knife-related convictions can affect a young person's future significantly:
- Many employers carry out DBS checks. A conviction may prevent certain career paths (healthcare, teaching, law, armed forces)
- Some convictions must be declared for university applications and student finance
- Travel to certain countries (USA, Australia, Canada) may be refused with a criminal record
- Housing applications, including social housing, can be affected
Support and Alternatives to Prosecution
Police and courts can divert young people away from prosecution through schemes such as Conditional Cautions , Deferred Prosecution , and referral to Youth Offending Teams (YOTs) . If your child is in contact with the justice system, contact your local YOT or a solicitor specialising in youth justice immediately.
Sources: Criminal Justice Act 1988 s.139; Offensive Weapons Act 2019; Ministry of Justice, Criminal Justice Statistics Quarterly, England and Wales 2023 (2024); Sentencing Council, Bladed Articles and Offensive Weapons Definitive Guideline (2017); Crown Prosecution Service, Knife Crime: Legal Guidance (2024). Last reviewed: April 2026.