What happened
At 8.45 on 25 September 2017 a 16-year-old pupil at a secondary academy in North Lincolnshire brought a kitchen knife to school in her bag. She checked that the inclusion support officer was alone in her office, then attacked her at her desk. Colleagues who heard the officer’s cries stopped it.
Per the Court of Appeal judgment the wounds were life-threatening. The officer lost 29 per cent of her blood, needed a transfusion, and was left with permanent scarring.
The judgment records what came before. The pupil had an excellent academic record and a stable home, and had also had suicidal thoughts for about two years and repeatedly self-harmed, hidden from her family. In year 9 friends raised their concern with the inclusion support officer, who, not wanting to blur her professional role, asked others to assist. The judgment records that her perception of this failure to help was the trigger.
The outcome
She pleaded guilty at Hull Crown Court on 1 December 2017 to wounding with intent and to having a bladed article; per Hull Live, an attempted murder charge had been dropped. On 2 February 2018 she was given an extended sentence of 12 years, seven in custody and five on licence.
The Court of Appeal allowed her appeal in part ([2019] EWCA Crim 801). It upheld the dangerousness finding, the highest guideline category and the aggravating features, including the school setting and other children present. The term fell because the judge had not treated the pupil’s mental disorder as a factor of lower culpability. Custody went from seven to five years.
What went wrong
The concern had no owner. A report from friends reached an adult and was redirected. The judgment records no assessment, referral, plan or review afterwards that made one person answerable for her welfare.
Concealment was the only signal. The self-harm was hidden at home and the pupil was academically strong and quiet. Everything the school measured read normal; what mattered was a peer’s account of a friend’s wellbeing.
One adult, one closed door. The officer was alone at the start of the day; the pupil checked before entering. No source describes a lone-working rule for that office, or a way a colleague would learn a closed door had gone wrong.
What it teaches
Self-harm rarely predicts violence. A pupil two years into unassessed distress is still a pupil whose risk nobody has looked at.
Passing a concern on is where concerns die. A referral needs a name, a date, a plan, and someone who checks it happened.
Being the adult a pupil has decided failed them is an exposure in itself. Grievance belongs in the risk file, written and shared.
Questions for the room
- When a pupil says they are worried about a friend, where does that go, and who owns it?
- For a pupil two years into self-harm with no referral, what do your records show?
- Which rooms put one adult alone behind a closed door with a pupil, and who would know?
Evidence and limits
Confidence: confirmed. Both sources were read live on 7 November 2026; Hull Live’s report of 2 February 2018 returns 403 to automated fetches and was opened in a browser.
The pupil is not named: she was a child and a section 45 order applied. The school is withheld because the press named her alongside it. The officer is not named, though the press named her; she was not convicted and no regulator determination names her.
No injury detail beyond what the sentence turned on. No school inquiry, regulatory referral or account of what the school changed appears in the sources.
Our physical intervention training covers what staff do when a weapon appears in a school.
Sources
- The National Archives (Find Case Law), 17 April 2019 · https://caselaw.nationalarchives.gov.uk/ewca/crim/2019/801
- Hull Live, 2 February 2018 · https://www.hulldailymail.co.uk/news/girl-who-stabbed-school-worker-1159423
Reviewed 7 November 2026.