I have to thank Dave Wilkinson the the information that this is the term used for staff working in the seized vehicles compound.
--- --- --- --- --- --- --- --- ---
Replying to:
What does the term Pinfold indicate on Merseyside Police patches? A Pinfold is an enclosure for stray animals, so maybe it refers to the stray animals officer? The term is not known when searching on the Merseyside Police Site!