Regimental police

Regimental Police or Regimental Provost (RP) are soldiers responsible for regimental discipline enforcement and unit custody in the British Army, some other Commonwealth armies and some armed forces structured in the British tradition. They belong to the regiment or corps in which they enforce discipline rather than the Royal Military Police or its equivalent.

Properly called Regimental Provost Staff in the United Kingdom, most Army battalions and regiments and the Royal Marines Commandos have an RP section, usually headed by the Regimental Provost Sergeant, who operates under the authority of the Regimental Sergeant Major (RSM). They are normally responsible for the maintenance of good order and military discipline, with all criminal offences being passed to the specialists of the Royal Military Police.

Members of a regiment's Provost Section can be identified by the brassards they wear, which carry the letters "RP". Unlike Service Police, RPs carry no warrant card and have no powers of arrest greater than those of citizen's arrest. They are not police officers and serve no policing function.

The roles of the Regimental Policemen (RP) in the Singapore Armed Forces are similar, in that they too enforce discipline and are responsible for the security of the base they are assigned to. The Regimental Policemen that once used to protect all camps and bases have been progressively replaced by Security Troopers. As of April 2011, all Regimental Policemen have been replaced by Security Troopers. These Security Troopers are better trained than the original RPs. Security Troopers are Operational Combat Soldiers with special Security Training. They are usually Full-time National Servicemen.

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Wikipedia