When an offence is such that the offender may be arrested without warrant generally—
(b) it is lawful for any person who is called upon to assist a police officer in the arrest of a person suspected of having committed the offence, and who knows that the person calling upon the person to assist is a police officer, to assist the officer, unless the person knows that there is no reasonable ground for the suspicion; and
(c) it is lawful for any person who finds another committing the offence to arrest the other person without warrant; and
(d) if the offence has been actually committed—it is lawful for any person who believes on reasonable ground that another person has committed the offence to arrest that person without warrant, whether that other person has committed the offence or not; and
(e) it is lawful for any person who finds another by night, under such circumstances as to afford reasonable grounds for believing that the other person is committing the offence, and who does in fact so believe, to arrest the other person without warrant.