 Divisional area codes are still used to identify the areas themselves, together with the police station and vehicles (if any) nominally covering them, but not officers.A one or two digit number denotes a Sergeant (except in larger boroughs where some sergeants are allocated three digit numbers), a three digit number denotes a Constable, a four digit number beginning with 5 denotes an officer of the Metropolitan Special Constabulary, unless they're attached to a 'Roads & Transport Policing Command' (RTPC) team, in which case the number will begin with an 8 and a four digit number beginning with 7 denotes a PCSO again unless they are attached to RTPC and they will start with a 6.Confusingly, MPS epaulettes display the letters "over" the digits, i.e.