Analysis of information sources in references of the Wikipedia article "Civilian" in English language version.
(2) In these Regulations—....."police officer" means a member of a police force or special constable; "police staff member" means—(a) a member of the civilian staff of a police force, including the metropolitan police force, within the meaning of section 102(4) and (6) of the 2011 Act
A person who is not professionally employed in the armed forces; a non-military person.