(1)  It is lawful for a police officer to arrest without warrant any person whom he finds committing a crime.

(2)  In any case where any of the crimes specified in Appendix A has been committed it is lawful for a police officer to arrest without warrant any person whom he believes on reasonable grounds to have committed such crime.

(3)  In any case where a police officer believes on reasonable grounds that any of the crimes specified in Appendix A has been committed it is lawful for him to arrest without warrant any person whom he believes on reasonable grounds to have committed such crime.

(4)  It is the duty of every person to arrest without warrant any person whom he finds committing any of the crimes in Appendix A .

(5)  In any case where any of the crimes specified in Appendix B has been committed it is lawful for any person to arrest without warrant any person whom he believes on reasonable grounds to have committed such crime.

(6)  It is lawful for any person to arrest without warrant any person whom he sees committing a breach of the peace or whom he believes on reasonable grounds to be about to commit or renew a breach of the peace.

(7)  It is lawful for any person who finds another lying or loitering in any place by night under such circumstances as to afford reasonable grounds for believing that he has committed, or is about to commit, a crime, and who does in fact so believe, to arrest him without warrant.

(8)  It is lawful for any person to arrest without warrant any person whom he believes on reasonable grounds to have committed a crime, and to be escaping from, and to be freshly pursued by, some person whom he believes on reasonable grounds to have authority to arrest him for that offence.

(9)  In every case under this section in which it is lawful for a police officer to arrest any person it is his duty to do so.

(10)  It is lawful for a police officer or the person in command of an aircraft to arrest without warrant on board that aircraft a person whom he finds committing, or attempting to commit, or whom he believes on reasonable grounds to have committed, or to have attempted to commit, a crime under Chapter XXXIA .

(11)  It is lawful for any person to assist the person in command of an aircraft to arrest without warrant any other person on board the aircraft unless he knows the arrest to be illegal.

(12)  The power of a police officer to arrest a person under this section is subject to the limits imposed on the power to arrest by section 24 of the Youth Justice Act 1997 .