What happened
On 24 April 2024, during the school day, a 13-year-old pupil at Ysgol Dyffryn Aman in Ammanford used a bladed multi-tool on two teachers and a 14-year-old pupil. All three were injured. One teacher was attacked first; a second tried to restrain the pupil and was injured doing it. She was restrained, which ended it. Pupils were locked down for about four hours, per the BBC’s report of 26 April 2024.
The outcome
Charged with three counts of attempted murder, she was remanded in youth detention at Llanelli Magistrates’ Court on 26 April 2024, per the BBC.
She admitted the stabbings and denied attempted murder, per the Crown Prosecution Service’s release of 28 April 2025. A jury at Swansea Crown Court found her guilty of attempting to murder all three victims. The CPS said the evidence showed her intent “when she brandished and used the weapon in a school”.
She was 13 at the time and 14 when sentenced to 15 years’ detention, to serve at least half. No regulator decision on the school appears in the sources read.
What went wrong
The restraint is not the failure. It ended an attack still going, and it is why the injuries stopped there. What failed sits either side of it.
The weapon was inside the building. Nothing in the record says how it got in, what screening existed, or whether anyone knew the pupil had it. A folding tool is the easiest blade to carry through a door.
Nobody had decided what staff should do. The first teacher had no warning; the second went hands-on against a blade and was hurt for it. Whether either was trained for an armed pupil is not recorded.
What it teaches
Where a pupil is attacking people with a blade, stopping her is necessary and proportionate, and here it worked. A policy that tells staff to keep their distance needs this exception written in, or a frightened adult will read it as an instruction to watch.
Preparation is where the cost is managed. The adults who intervened were hurt, which is the price of closing on a blade. A team that has agreed who takes the weapon arm, who calls, when to break off and who treats the injured adult does better than one improvising.
Intent decided the trial, and it rested on what she did and said while armed. Every adult in that room becomes a witness, and their accounts, written early and plainly, are the evidence.
Questions for the room
- If a pupil produced a blade in front of you now, which adult closes, who calls, and where do the other pupils go? When did your team last practise it?
- If a colleague took hold of an armed pupil and was cut, who treats the adult while police are on their way?
- What does your setting know about a pupil before a day like this, and what does it do with that?
Evidence and limits
Confidence: confirmed. The CPS release of 28 April 2025 and the BBC’s report of 26 April 2024 were read live on 7 November 2026. A Dyfed-Powys Police release returns 403 to automated fetches, so nothing rests on it.
The pupil is not named at any age: she is a child, and reporting restrictions bar publication of anything that could identify her. The school is named because the Crown’s own release names it, and a school that size does not identify her. The two injured teachers are not named; they are victims, not the subject of a finding. No judgment was published, so the trial account is the Crown’s.
Our physical intervention training works through the armed-pupil decision: when to close, when to contain.
Sources
- Crown Prosecution Service, 28 April 2025 · https://www.cps.gov.uk/cymruwales/news/teenage-girl-sentenced-attempted-murder
- BBC News, 26 April 2024 · https://www.bbc.com/news/uk-wales-68907803
Reviewed 7 November 2026.