battery, battery not made out, breach, causation, chain of causation broken, distinct and significant criminal action of third party led to arrest leading up to injury, duty of care, no breach made out, novus actus interveniens, police officers owe duty to take reasonable care to avoid risk of harm to class of persons in immediate vicinity of operational response during protest march, police utterly without fault in colliding with the respondent, public authorities, reasonable to effect arrest in the way done, regard to be had to police obligations to take actions to prevent breaches of the peace even in crowded situations, risk of harm in police actions inflicting physical injury on identified class of person, s43A of Civil Liability Act 2002 (NSW) inapplicable, third party actions leading to respondent’s injury not occurring in ordinary course of events which might flow from police action, Trespass to the person
breach, foreseeability of risk, formulation of risk, negligence, obvious risk, where council did not take reasonable precautions advised, where council was independently advised to take steps to mitigate risk, where the Australian playground maintenance standards applied, whether height differential between surface in a playground gave rise to a reasonably foreseeable risk of harm, whether height differential was readily discernible
breach, common knowledge, constant supervision, duty of care, failure to enforce own rules., formulation of risk, lifting heavy weights, negligence, not insignificant, obvious risk, reasonable precaution, system of inspection