The Police National Legal Database (PNLD) is a comprehensive legal database covering all legal information that police officers are required to know. It is housed within West Yorkshire Police Training School at Bishopsgarth in Wakefield and is the official online legal database used by the 43 police forces in England & Wales. Dr Mark Hartley is a former police officer with West Yorkshire Police and legal adviser for the Police National Legal Database. He is currently a strategic consultant in operational policing with the Abu Dhabi Police. He has a Law degree from Leeds University, later qualifying with a graduate certificate and diploma in management studies and a post graduate diploma in Law with distinction. He also has a PhD in policy transfer from Leeds University.