A list of aconyms used in the show, and their meanings.
| Acronym | Definition |
|---|---|
| ABH | Actual Bodily Harm |
| AC | Anti-Corruption |
| ACC | Assistant Chief Constable |
| AFO | Authorised Firearms Officer |
| ANPR | Automatic Number Plate Recognition |
| ARU | Armed Response Unit |
| ARV | Armed Response Vehicle |
| CASEVAC | Casualty Evacuation |
| CC | Chief Constable |
| CCTV | Closed Circuit Television |
| CHIS | Covert Human Intelligence Source |
| CID | Criminal Investigation Department |
| CPS | Crown Prosecution Service |
| CS | Chief Superintendent |
| CT | Counter Terrorism |
| DC | Detective Constable |
| DCC | Deputy Chief Constable |
| DCI | Detective Chief Inspector |
| DCS | Detective Chief Superintendent |
| DI | Detective Inspector |
| DIR | Digital Interview Recorder |
| DNA | Deoxyribo-Nucleic Acid |
| DOA | Dead On Arrival |
| DOB | Date of Birth |
| DS | Detective Seargent |
| DVLA | Driver Vehicle Licensing Authority |
| ETA | Estimated Time of Arrival |
| FC | Forensic Co-ordinator |
| FFU | Financial Forensic Unit |
| FI | Forensic Investigator |
| FLO | Family Liaison Officer |
| FME | Forensic Medical Examiner |
| HCP | Health Care Professional |
| HMP | Her Majesty’s Prison |
| GBH | Grievous Bodily Harm |
| GPR | Ground Penetrating Radar |
| GPS | Global Positioning System |
| GSR | Gun Shot Residue |
| GSW | Gun Shot Wound |
| I/P | Injured Party |
| IC | Identity Code |
| ICU | Intensive Care Unit |
| ID | Identification |
| IP (Address) | Internet Protocol (Address) |
| IPCC | Independent Police Complaints Commission |
| IR | Icident Response |
| ISP | Internet Service Provider |
| INTEL | Intelligence |
| MISPER | MISsing PERson |
| MIT | Murder Investigation Team |
| MO | Modus Operandi |
| NABIS | NAtional Ballistics Intelligence Service |
| NPAS | National Police Air Service |
| OBS | Observation |
| OCG | Organised Crime Group |
| OFC | Operational Firearms Commander |
| OIC | Officer In Charge |
| OP(S) | Operation(s) |
| PACE | Police & Criminal Evidence Act |
| PCC | Police & Crime Commisioner |
| PCSO | Police Community Support Officer |
| PIM | Post-Incident Manager |
| PIP | Professionalising Investigation Programme |
| PM | Post Mortem |
| PNC | Police National Computer |
| PC | Police Constable |
| PS | Police Seargent |
| RT | Radio Transmission |
| RTC | Road Traffic Collision |
| SCG | Serious Crime Group |
| SIO | Senior Investigating Officer |
| SITREP | SITuation REPort |
| SFC | Strategic Firearms Command |
| TA | Tactical Advisor |
| TFC | Tactical Firearms Commander |
| TO-20 | Tactical Operations Unit 20 |
| TSG | Tactical Support Group |
| UCO | UnderCover Operative |
| VPN | Virtual Private Network |
| VPU | Vulnerable Prisoner Unit |