Second-job titles include vicar, pole-dancing teacher, pallbearer, ski instructor, ice-cream salesman and a medium, the Mail reported.
Police staff are allowed to take second jobs if permitted by their superiors. However, 23 of the country’s 44 forces did not check to see if they were paying for services delivered by companies run by their own officers, according to the report.
The study used figures provided by Her Majesty’s Inspectorate of Constabulary, which showed 23,043 police staff had second jobs out of a workforce of 201,575 in May 2012.
A Home Office spokesman said: “It is the responsibility of chief constables to ensure that any secondary jobs held by officers do not harm the public’s perception of the police or result in any conflict of interest.
“The Home Secretary will put new proposals ensuring the highest standards of integrity in the police to Parliament in the new year.”