5. Necessity for arrest without warrant: Constables - S.24(5) PACE 1984
(b) correspondingly as regards the person's address
(c) to prevent the person in question -
i. causing physical injury to himself or any other person;
ii. suffering physical injury;
iii. causing loss of damage to property;
iv. committing an offence against public decency (subject to subsection (6)); or
v. causing an unlawful obstruction of the highway;