Sheffield constitutes one of its four Basic Command Units ( Barnsley , Doncaster and Rotherham being the other three ) .
Sheffield is policed by South Yorkshire Police ( a territorial police force ) whose headquarters are in the city .
Sheffield constitutes one of Sheffield 's four Basic Command Units ( Barnsley , Doncaster and Rotherham being the other three ) .
Sheffield is policed by South Yorkshire Police ( a territorial police force ) whose headquarters are in the city .