Police ranks are a system of hierarchical relationships in police organisations. The rank system defines authority and responsibility in a police organisation, and affects the culture within the police force. Usually, uniforms denote the bearer's rank by particular insignia affixed to the uniforms.
Most of the police forces of the United Kingdom (including those of the British Overseas Territories and the Crown Dependencies) use a standardised set of ranks. However, as law enforcement in the United Kingdom is organised separately in the three jurisdictions of England and Wales, Northern Ireland, and Scotland, and as most law enforcement is carried out by police officers serving in regional police services known as territorial police forces, some variations in rank organisation, insignia and responsibilities may occur within the United Kingdom. An example of this is the slight variations in the most senior ranks of the Metropolitan Police and the City of London Police. Parallel to the regional services are UK-wide agencies, such as the British Transport Police and the national specialist units of certain territorial police forces, with a possibility of further variations.
Due to policing in many countries developing from military organisations and operations, police ranks in many countries follow a logic similar to that of military ranks. Most of the British police ranks that exist today were, however, deliberately chosen by Home Secretary Sir Robert Peel so that they did not correspond with military ranking. They were enacted under the Metropolitan Police Act 1829.
Powers
In law, every attested police officer is a constable whatever their actual rank, in the sense that officers of any rank have the same powers of arrest. The basic police powers of arrest and search of an ordinary constable are identical to those of a superintendent or chief constable; however certain higher ranks are given administrative powers to authorise certain police actions. In England and Wales, these include the powers to: authorise the continued detention of up to 24 hours of a person arrested for an offence and brought to a police station (granted to custody officers at designated police stations), authorise section 18 (1) PACE searches of premises (granted to inspectors and above), extend the length of prisoner detention to 36 hours (granted to superintendents and above), extend the length of bail from a police station to three months (granted to inspectors) or up to six months (granted to superintendents and above) authorise section 35 Anti-social Behaviour, Crime and Policing Act 2014 dispersal powers to constables within a specified locality not exceeding 48 hours (granted to inspectors and above) designating a locality not exceeding 24 hours whereas the wearing of clothing that conceals another's identity within that specified locality is an offence (granted to inspectors and above), sections 157 to 159 Crime and Policing Act 2026 authorising the use of section 60 Criminal Justice and Public Order Act 1994 stop and searches within a specified locality to constables not exceeding 24 hours (granted to inspectors and above) authorising constables to demand the removal of face coverings section 60AA Criminal Justice and Public Order Act 1994 within a specified locality not exceeding 24 hours (granted to inspectors and above)
In relation to police officers of the Home Office or territorial police forces of England and Wales, section 30 of the Police Act 1996 states that "a member of a police force shall have all the powers and privileges of a Constable throughout England and Wales and the adjacent United Kingdom waters". Police officers do not need to be on duty to exercise their powers and can act off-duty if circumstances require it (technically placing themselves back on duty). Officers from the police forces of Scotland and Northern Ireland and non-territorial special police forces have different jurisdictions. See List of law enforcement agencies in the United Kingdom, Crown Dependencies and British Overseas Territories for a fuller description of jurisdictions. The BTP have policing rights as a Constable.
Detective, reserve and other rank types Detectives Officers holding ranks up to and including chief superintendent who are members of the Criminal Investigation Department (CID) or Special Branch (and certain other units) have the prefix "detective" before their rank. Due to the nature of their duties, these officers generally wear plain clothes (except for ceremonial purposes) and so do not wear the corresponding rank insignia; however, they still operate within the same structure as their uniformed counterparts.
In the UK, detective ranks are not superior to those of uniformed officers, and a detective has the same powers and authority as a uniformed officer of the same rank. The "detective" prefix designates that the officer has received suitable training and passed related examinations to conduct serious or complex criminal investigations.
Special constables
There are various grades of special constable which assist in the tasking and management of the constabulary. The ranks are management grades; those holding them are not "sergeants" or "inspectors" for the purposes of the law (for example, authorisations to order the removal of disguises or to set up roadblocks). Originally, specials held the same ranks and used the same rank insignia as regular officers, but there was a general shift to distinct terms such as "area officer" and "divisional officer" in the 1980s. However, since 2000, the National Policing Improvement Agency has encouraged special constabularies to return to rank structures and epaulette insignia identical to their regular counterparts. Although most forces have now reverted to regular rank titles (with the prefix "special"), only some have reverted to regular rank insignia. Senior special constables have no authority over regular officers, but very experienced officers may occasionally be given administrative supervision of mixed units of regular and special constables for certain events where no regular supervisory officer is available.
Trainee, temporary, acting and interim ranks Constables who are training to become detective constables sometimes bear the title trainee investigator (T/I) or trainee detective constable (T/DC).
The term "temporary" before a rank (such as temporary detective sergeant, abbreviated T/DS) denotes an officer who has been temporarily promoted to a rank (and so who does actually hold that rank, albeit on a temporary basis), whilst the term "acting" (for example, acting inspector, abbreviated A/Insp) denotes an officer who is performing the role of a higher rank than the one actually held (sometimes informally termed "acting up"). Temporary ranks are often used for set periods (for example, a six-month appointment to a particular role), whereas acting ranks, although sometimes held for extended periods, are often used for a very short time (such as a single shift when additional supervisory officers are required, or to replace an officer on short-term leave). There has also been use of the term "interim" before a rank for an officer that holds the rank substantively, but for a set period, such as during recruitment for a permanent office-holder.
Under section 107 of the Police and Criminal Evidence Act 1984 (England and Wales only), sergeants and chief inspectors may be designated (by an officer of at least the rank of superintendent) to exercise the powers of an inspector or a superintendent respectively. Such a designation will generally accompany such an officer being given an acting rank, so for most operational purposes there is no difference between substantive, temporary and acting ranks at Inspector and above (although there may be differences as to pay, pensions and insignia). However, under section 36 of that act, only substantive sergeants may be appointed custody officers.
Rank as related to officer identification numbers All officers have a unique identification number. These are usually referred to as shoulder or collar numbers, referring to the fact that they were once worn on the uniform collar and later on the epaulettes by constables and sergeants. Uniformed officers in many forces still wear them on the epaulettes, but other forces have badges or other ways of displaying their identification numbers. Kent Police, for instance, refers to its numbers as force numbers and officers wear them on a velcro tab on their stab vest or on a badge attached to their shirt or tunic. Officers in all forces of the rank of inspector or above do not usually wear their numbers.
In most forces these identification numbers are simple numbers, with one to five digits.
The Metropolitan Police and Police Scotland, as well as a few other forces, use a letter and number system:
Metropolitan Police: Sergeant: Borough code and one, two or three digits Constable: Borough code and three or four digits Special constable: Borough code and four digits, usually beginning with the number 5 (8 for traffic/transport or 9 for specialist units) PCSO: Borough code and four digits, the first digit being a 7
Police Scotland:
Sergeant and constable: Division letter and three or four digits Special constable: Division letter and four digits, the first digit being a 7
In the Metropolitan Police, the borough code is a two-letter code which follows the digits (but displayed above them on epaulettes). Before the reorganisation into boroughs, each division had a different code, with sergeants having two-digit numbers and constables having three-digit numbers.
Rank insignia Badges of rank are usually worn on the epaulettes. However, when in their formal uniform sergeants wear their rank insignia on their upper sleeves. When police tunics had closed collars (not open collars as worn with ties), constables and sergeants did not wear epaulettes but had their divisional call number on their collar (hence they are still often referred to as collar numbers). Sergeants wore their stripes on their upper sleeve. Inspectors and more senior ranks wore epaulettes at a much earlier stage, although they once wore their rank insignia on their collars. Most forces no longer use divisional call numbers, and retain only the collar number and rank insignia.
Great Britain Senior officers usually wear distinguishing marks around the outer edge of the peaks of their caps (or under the capbadge for female officers, who do not wear peaked caps). Normally this is a raised black band for inspectors and chief inspectors, a silver (gold in the City of London Police) band for superintendents and chief superintendents, and a row of silver oak leaves for chief officers. Chief constables, the Commissioner of the City of London Police, and all commissioner ranks of the Metropolitan Police wear oak leaves on both the outer and inner edges of their peaks (or a double row beneath the capbadge for female officers). In Scotland, however, the mark is a silver band for inspectors and chief inspectors, a silver band and silver oak leaves on the outer and inner edges of the peak respectively for superintendents and chief superintendents, and silver oak leaves on the outer and inner edges of the peak for all chief officers.
Additionally, officers at or above the rank of commander or assistant chief constable wear gorget patches on the collars of their tunics. The gorget patches are patterned after those worn by general officers of the British Army and Royal Marines; the police versions, however, are of silver on black (gold on black in the City of London Police) rather than gold on red, in keeping with the police uniform colours.