BCU replaces the earlier terms Sub-Division and Division that had been in use since the 1880s.
Each LPU is in turn organized into four Core Policing Teams (CPTs) that manage its different core functions: Investigation, Neighbourhood, Response and Community Action and Priority Team (CAPT).
The force is now divided directly into five Districts, each headed by a Chief Inspector.
These were formerly grouped into two Areas (BCUs), North and South, each headed by a Chief Superintendent.
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