"It should be the case that, rather than teachers having to demonstrate the force that was used was reasonable and proportionate, the automatic assumption should be that you trust the teacher's judgement," he said. "And that they feel empowered to use whatever force they consider to be appropriate in order to pull apart pupils who are misbehaving, and if anyone has a complaint, then the onus of proof is on the complainant, not on the teacher to defend themselves."