Provost sergeant

In the British Army and land forces of the Commonwealth, a Provost Sergeant (PS) is the non-commissioned officer in charge of the regimental police and is the senior law enforcement officer in each regiment or battalion. The PS is a member of the regiment or corps in which he serves and not a member of the Royal Military Police. While a Provost Sergeant holds the military rank of Sergeant, the Provost Sergeant title is a position and not a formal rank itself. A Provost Sergeant wears no distinctive trade badge. He can, however, be identified by the brassard he wears on his uniform, which carries the letters "PS" as well as his sergeant's stripes.