President of the Association of Chief Police Officers Sir Hugh Orde has hailed retiring West Yorkshire chief constable Sir Norman Bettison's "outstanding contribution" to the police service.
Sir Hugh said in a statement:
Sir Norman Bettison has served the public as a police officer with distinction for nearly 40 years, and at the rank of chief constable since 1998.
At the national level he has made an outstanding contribution to the work of the police service as a whole in cutting crime and keeping the public safe.
He has lead in a number of national areas such as the development of neighbourhood policing and the police approach to preventing terrorism and violent extremism.
His depth of knowledge and experience is highly regarded within the service and he will be a great loss to policing.