School Exclusion and Knife Crime: What the Evidence Shows — and How DSLs Should Respond

The Evidence: Why Exclusion Raises the Risk

The link between school exclusion and youth violence is one of the most robust findings in UK safeguarding research. A 2022 Youth Endowment Fund analysis of over 13,000 children found that exclusion from school nearly doubles the likelihood of subsequent involvement in serious violence — including knife carrying and knife victimisation.^[1]

This is not because excluded pupils are simply "bad kids." Exclusion itself is the risk factor. Removed from the structured environment that provides supervision, prosocial peer relationships, and trusted adult contact, excluded young people become significantly more accessible to criminal exploitation, gang recruitment, and county lines grooming. The exclusion does not cause the violence directly — it removes the protective structures that were preventing it.

The KCSIE 2024 and Working Together 2023 Obligations

Keeping Children Safe in Education 2024 is unambiguous: schools have a duty to consider the safeguarding implications of any exclusion decision. Key requirements include:

• The DSL must be involved in any decision to exclude a pupil who is subject to a Child Protection Plan, is looked after, or where there are existing exploitation concerns
• Schools must ensure that excluded pupils continue to receive education from day one of a fixed-term exclusion (or from day six for permanent exclusions), with clear reintegration planning
• Where a pupil is permanently excluded and there are unresolved safeguarding concerns, the DSL must ensure a formal handover to the receiving school or alternative provision
• Working Together to Safeguard Children 2023 requires multi-agency escalation where a pupil's exclusion is connected to exploitation or criminal activity

DSL Practice: What to Do When Knife Concerns and Exclusion Intersect

The "Knife Found on Premises" Protocol

When a knife is found on school premises, DSLs must act immediately across three parallel tracks:

1. Police: All knife discoveries in school must be reported to police. There is no discretion here — possession of a bladed article in a school is a criminal offence under Section 139A of the Criminal Justice Act 1988. Call 101 (or 999 if there is an immediate threat).
2. MASH Referral: Report to your local MASH the same day. Even if the pupil has no prior safeguarding history, the knife possession itself creates a new referral threshold under Section 17 Children Act 1989.
3. Documentation: Record the full sequence of events in the safeguarding file — time found, who found it, condition, location, what the pupil said, who was informed and when. Ofsted will look for this if a serious case is later reviewed.