Police officers (Sergeant and below) co-ordinate and undertake the investigation of crimes, patrol public areas, arrest offenders and suspects and enforce law and order. Officers of the British Transport Police operate within the specialised police service for the railway network across Britain.
There are no academic requirements for entry to the civilian (Home Office) police although eligibility criteria vary across individual police forces. Entrants must sit an entry test and pass a medical examination. All police officers undergo a two year probationary training period. Residency, nationality and age restrictions apply, and background security checks are carried out in respect of entrants.