West Yorkshire fire service private eye tracker use 'wrong'
6 August 2013 Last updated at 20:43 BST
A 999 call handler who had a tracking device placed on her car by a private detective hired by her bosses said the action was "totally wrong".
Anthea Orchard, 35, said West Yorkshire Fire Service (WYFS) began monitoring her after she was signed off work with stress.
She said bosses suspected she was using the time to run her part-time balloon decorating business.
Mrs Orchard said the use of the tracker was "totally disproportionate" and "unbelievable".
WYFS has refused to comment but the regional Fire Brigades Union said it was aware of at least one similar case.