Serious disorder, property damage and injury: understanding the thresholds for force
The 2026 DfE guidance reminds schools that reasonable force may be used in specific circumstances: to prevent injury to any person, prevent a criminal offence, prevent damage to property, or prevent serious disorder.
Those words matter. They are thresholds, not vague permissions.
Force is not justified because behaviour is frustrating. It is justified, where lawful, because a specific harm needs to be prevented.
That distinction is essential for classroom teachers, behaviour leads and anyone likely to respond during escalation.
In real school life, incidents are rarely neat. A pupil may be shouting, refusing, threatening, damaging property and upsetting a whole class. Staff may feel intense pressure to “do something”. But the use of force still needs to connect to a lawful purpose and be necessary and proportionate.
Gary Klein’s work on decision-making under pressure is helpful because it shows that people often act from pattern recognition. If the school has trained the wrong patterns — “defiance means removal,” “shouting means control,” “damage means grab” — staff may act too early or too physically. If the school trains the right patterns, staff become better at identifying the actual threshold.
Let us take the four categories.
- Preventing injury
This is often the clearest threshold. A pupil is about to strike another pupil. A child is running towards a road. A pupil is attempting serious self-injury. Staff may need to act quickly. Even then, the intervention must be the least restrictive safe option.
- Preventing a criminal offence
This might include serious assault or other unlawful acts. Staff need caution here. The purpose is not to punish or enforce school rules but to prevent a specific offence.
- Preventing property damage
Not all property issues justify physical intervention. A pupil snapping a pencil is not the same as throwing heavy furniture or trying to smash a glass panel. Proportionality matters.
- Preventing serious disorder
This is a phrase schools should define carefully in training. Low-level disruption is not automatically serious disorder. A developing fight, a dangerous crowd situation or an incident likely to escalate rapidly across a group may be different.
The practical question for staff is: what harm is likely if I do not intervene now?
If the answer is vague — “they were being difficult” — the threshold is probably not clear enough. If the answer is specific — “they were moving towards another pupil with a raised chair” — the decision can be assessed more carefully.
This does not mean staff must wait until someone is injured. Prevention is allowed. But prevention must be linked to a foreseeable harm, not a desire to regain authority.
There is also a time factor. A situation can move into and out of threshold. A pupil may present immediate risk for ten seconds and then step back. Force that was necessary at the peak may become unnecessary once the risk reduces. That is why the guidance emphasises the shortest time possible.
The threshold for starting an intervention is not permission to continue it indefinitely.
Schools should therefore train staff to keep reassessing:
- Is the risk still present?
- Can we reduce the level of force?
- Can we create space?
- Can we change staff?
- Can we move from holding to guiding?
- Can we release safely?
This reassessment should be part of scenario practice, not left to chance.
For behaviour leads, one useful exercise is to take common school incidents and sort them into categories:
- no physical intervention; use behaviour systems
- de-escalation and environmental management
- call for support and monitor
- possible physical intervention if risk increases
- immediate physical intervention likely justified
This helps staff see that not every refusal, insult, disruption or damage incident sits in the same category.
The recording system should also reflect thresholds. Records should state the harm being prevented, not merely the behaviour observed. “Pupil refused to leave” does not explain force. “Pupil attempted to strike another child after refusing to leave” is more meaningful.
For staff confidence, this clarity is protective. Staff are less likely to freeze when they know the threshold. They are also less likely to intervene physically when the threshold has not been met.
I hope the above helps. The 2026 guidance gives schools a legal frame, but the frame only becomes useful when staff can apply it in ordinary school language. What harm are we preventing? Is force necessary? Is it proportionate? Can it end now? Those questions should sit at the heart of training.
This guide on serious disorder, property damage and injury: understanding is part of our ongoing work with schools and academies.