POLICE administration staff in West Yorkshire are the worst paid in the country.
Receptionists and secretaries are paid just £10,149 - £6,000 less than those doing exactly the same job in Warwickshire.
Unison, the union that represents more than 30,000 police staff, has today called for action to stop what it calls `discrimination' across different forces.
Unison officer for police staff Ben Priestley said: "This survey gives damning evidence of the unaccountable variations in police staff pay from one force to the next.
"These statistics bring shame on the whole police staff pay system.
"Unison is determined to close this pay gap because it is damaging to the image of the police service. It is bad for staff morale and bad for performance.
"We want to see new terms and conditions that treat police staff as an integrated national workforce with all staff treated equally and fairly."
The union wants the police to carry out pay audits across the country to make sure people in different areas are paid equally.
A West Yorkshire Police spokesman said: "Salaries for members of police staff are decided by a panel comprising of representatives of both the force and unions. Factors such as local market forces are considered in reaching decisions.
He said the force has asked for an independent review and comparison of police staff's pay.