Centrex was responsible for overseeing the design and delivery of probationer training, investigators training and other key areas. Centrex was also responsible for evaluating police training to see if it actually works. Centrex also set the national police promotion exams, probationer development tests and advised on the assessment of recruits.
Centrex was staffed by a mixture of non-police officers (civil servants) and seconded police officers.
Centrex was formerly known as National Police Training (NPT).
From 1 April 2007, the functions of Centrex and other bodies were merged into the National Policing Improvement Agency (NPIA). The NPIA works in partnership with forces and policing bodies to improve the way they work across many areas of policing.
The NPIA has also taken on much of the work of the Police Information Technology Organisation (PITO), a non-departmental public body that supported the police service in rolling out operational change programmes, and a number of smaller ad-hoc projects, but has no formal remit for the eight Scottish forces and will not be a supplier of national policing IT systems.