The Royal Navy Police (RNP) is the
service police branch of the
Royal Navy
The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
and
Royal Marines
The Royal Marines provide the United Kingdom's amphibious warfare, amphibious special operations capable commando force, one of the :Fighting Arms of the Royal Navy, five fighting arms of the Royal Navy, a Company (military unit), company str ...
. Members of the RNP enforce service law and discipline.
The Royal Navy Police was known as the Royal Navy Regulating Branch until 2007, when the service was renamed the Royal Navy Police in a change brought about by the Armed Forces Act 2006. Members were known as "Regulators" until 2009, since then they have been known as Royal Navy Police.
The RNP subsumed the
Royal Marines Police
The Royal Marines Police, or Royal Marines Police Troop (RM Police Troop) is the Royal Marines element of the Royal Navy Police and the military police arm of the Royal Marines. Members of the RM Police enforce service law and discipline.
St ...
in 2009, although for operational purposes the majority of the two cadres of personnel are employed within their respective areas of the service. The RNP provides a
Troop
A troop is a military sub-subunit, originally a small formation of cavalry, subordinate to a squadron. In many armies a troop is the equivalent element to the infantry section or platoon. Exceptions are the US Cavalry and the King's Troo ...
strength unit of Royal Marines to 3 Commando Brigade to provide policing services as part of the UK Landing force.
The motto of the RNP is which translates from Latin into English as 'Do not yield to adversity' or 'Do not give in to evil'.
The RNP is the smallest of all police branches in the three services, with its provost marshal holding the rank of commander.
History
The Royal Navy has always, in one way or another, had the need to maintain order and discipline. When at sea, historically, the
captain
Captain is a title, an appellative for the commanding officer of a military unit; the supreme leader or highest rank officer of a navy ship, merchant ship, aeroplane, spacecraft, or other vessel; or the commander of a port, fire or police depa ...
was the king's representative, his rule was kept by the first lieutenant, who was assisted by a person known as ''thee Ship's Marshal'', who was supported by a number of ship's corporals. Ship's marshals were abolished and replaced by the
Master At Arms (MAA) rate, which was introduced in about 1699, a tradition that continues right up to the present day.
On punishment day, ''at six bells in the forenoon watch'', the order was given,''"All hands to witness punishment"''. The master at arms presented the offender to the captain, who questioned him about the offence and then delivered a verdict. The officer of the offender's division was asked if he had anything to say in mitigation. If their reply did not satisfy the captain, he ordered the man's punishment. Other than the actual act of flogging; the MAA was responsible for ensuring that any punishment awarded was carried out. The MAA was also accountable to the Lieutenant at arms for the duties of the ship's corporals, the supervision of sentries, the guard, and training the ship's company in the use of small arms. Another duty that the MAA performed was, at around 9 pm, to patrol the ship and check that all lanterns and fires were out, and that no men were intoxicated. Probably an early form of evening rounds.
In September 1944,
the Admiralty
The Admiralty was a department of the Government of the United Kingdom that was responsible for the command of the Royal Navy.
Historically, its titular head was the Lord High Admiral – one of the Great Officers of State. For much of its h ...
concluded that the organisation for the maintenance of discipline on shore in the main naval port areas was unsatisfactory.
Colonel
Colonel ( ; abbreviated as Col., Col, or COL) is a senior military Officer (armed forces), officer rank used in many countries. It is also used in some police forces and paramilitary organizations.
In the 17th, 18th, and 19th centuries, a colon ...
D.H.C. Shepherd,
R.M., previously the Naval Provost Marshal in
Malta
Malta, officially the Republic of Malta, is an island country in Southern Europe located in the Mediterranean Sea, between Sicily and North Africa. It consists of an archipelago south of Italy, east of Tunisia, and north of Libya. The two ...
, carried out a study into the requirement for a naval provost organisation. He reported that the system of landing ships' patrols in major naval base areas was unsatisfactory because the petty officers and leading ratings in charge, (however well briefed) lacked the knowledge and experience to deal with incidents, and being unable to render lucid written reports, avoided taking action wherever possible. The men detailed for patrol disliked the duty intensely believing it to be a form of punishment.
The Shepherd report recommended the introduction of a Leading Patrolman rating to become the junior member of the Regulation Branch and borne primarily for provost duties, and the creation of a provost organisation to operate within the major naval port areas. Admiralty Fleet Order 6681/44 of 21 December 1944 implemented the proposals of the Shepherd report.
As a result of the Shepherd report, regulating branch training, which hitherto had been carried out in the barracks of the main ports, was centralised. In 1945, a Royal Navy Regulating School was established at Beechwood Camp in Devon to train all regulating ratings and to maintain branch records. In 1946, the school moved to Fort Wallington near Portsmouth, then in 1947 to in Essex, then in 1948 to , where it remained until November 2005. Initially, the role of the leading patrolman was to augment naval patrols on shore, and assist in regulating duties as necessary. In 1968 leading patrolmen were renamed leading regulators.
In 2007 the Royal Navy Regulating Branch was renamed the Royal Navy Police in a change brought about by the Armed Forces Act 2006.
Role

The work of the RNP encompasses dealing with routine disciplinary matters, investigation of crime, crime prevention, and advice to the command on general security and
close protection
A bodyguard (or close protection officer/operative) is a type of security guard, government law enforcement officer, or servicemember who protects an important person or group of people, such as high-ranking public officials, wealthy business ...
matters. As such, members of the RNP are employed in both uniformed and plainclothes roles, on ships, within shore establishments and in
3 Commando Brigade
United Kingdom Commando Force (UKCF), previously called 3 Commando Brigade (3 Cdo Bde), is the UK's special operations-capable commando formation of the Royal Marines. It is composed of Royal Marine Commandos and commando qualified personnel f ...
and other Royal Marine units.
Individuals posted on ships and within shore establishments are responsible, through their
chain of command
A command hierarchy is a group of people who carry out orders based on others' authority within the group.
Military chain of command
In a military context, the chain of command is the line of authority and responsibility along which orders ...
for:
* Maintenance of good order and discipline
* Investigating breaches of service discipline
* Investigation of crime
* Evidence gathering
* Crime reduction initiatives
* Liaison with
territorial police forces
A territorial police force is a police service that is responsible for an area defined by sub-national boundaries, distinguished from other police services which deal with the entire country or a type of crime. In countries organized as federation ...
and
special police forces
Special police usually describes a law enforcement agency or unit within a such an agency whose duties and responsibilities are significantly different from other forces in the same nation, jurisdiction, or from other personnel within the same agen ...
in the UK.
Although members of the RNP are not warranted
constables
A constable is a person holding a particular office, most commonly in law enforcement. The office of constable can vary significantly in different jurisdictions. ''Constable'' is commonly the rank of an officer within a police service. Other peo ...
, the force as a whole is subject to inspection by
HM Inspectorate of Constabulary, in the same way as the UK's civilian police forces.
Jurisdiction
Over service personnel
The RNP have jurisdiction over members of the Royal Navy subject to service discipline, as well as having reciprocal powers to deal with service personnel of the other two branches of the Armed Forces: the
British Army
The British Army is the principal Army, land warfare force of the United Kingdom. the British Army comprises 73,847 regular full-time personnel, 4,127 Brigade of Gurkhas, Gurkhas, 25,742 Army Reserve (United Kingdom), volunteer reserve perso ...
and The
Royal Air Force
The Royal Air Force (RAF) is the Air force, air and space force of the United Kingdom, British Overseas Territories and Crown Dependencies. It was formed towards the end of the World War I, First World War on 1 April 1918, on the merger of t ...
.
Over civilians
The RNP have jurisdiction over some civilians in certain circumstances, as defined by the Armed Forces Act 2006.
The RNP have been granted maritime law enforcement powers within English and Welsh territorial waters under the Police and Crime Act 2017
by virtue of a statutory instrument, which came into effect on 7 January 2021.
These powers include power to stop, board, divert and detain vessels, the power to search vessels and persons and the power to arrest persons in England and Wales waters. The powers can only be exercised in Scotland waters where there has been a hot pursuit. The authority of the Secretary of State is required before a law enforcement officer boards a United Kingdom ship in foreign waters and such authority may only be exercised if the State, or the relevant territory, in whose waters the powers would be exercised consents to the exercise of the powers.
The policy context is that contingency work for the end of the EU Transition Period identified that there may be an operational requirement to extend law enforcement powers to Royal Navy Police, which were granted with the caveats that the powers would only be used where police permission was granted, that no law enforcement activity will be undertaken independently and that the arrangements will be reviewed every six months.
This is one of the only known examples where the armed forces (albeit, a specific branch) have powers of arrest over civilians whilst within the territory of the UK.
Organisation

The Royal Navy Police is headed by the Provost Marshal (Navy) (PM(N)), based at ''HMS Excellent'', Portsmouth, who is responsible for the management of the service, and the assurance of professional standards delivered by the RNP in the course of their duties.
Each RNP Regional Command Unit is led by an Officer Commanding at
Lieutenant rank.
* Headquarters, Royal Navy Police (RNP), at ,
HMNB Portsmouth
His Majesty's Naval Base, Portsmouth (HMNB Portsmouth) is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Clyde and HMNB Devonport). Portsmouth Naval Base is part of the city of Portsmouth; it is loc ...
** Provost Marshal of the Royal Navy Police (PM(N)),
Commander
Commander (commonly abbreviated as Cmdr.) is a common naval officer rank as well as a job title in many army, armies. Commander is also used as a rank or title in other formal organizations, including several police forces. In several countri ...
** RNP Regional Command Unit (East), at
HMNB Portsmouth
His Majesty's Naval Base, Portsmouth (HMNB Portsmouth) is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Clyde and HMNB Devonport). Portsmouth Naval Base is part of the city of Portsmouth; it is loc ...
** RNP Regional Command Unit (West), at
HMNB Devonport
His Majesty's Naval Base, Devonport (HMNB Devonport) is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Clyde and HMNB Portsmouth) and is the sole nuclear repair and refuelling facility for the Roya ...
** RNP Regional Command Unit (North), at
HMNB Clyde
His Majesty's Naval Base, Clyde (HMNB Clyde; also HMS ''Neptune''), primarily sited at Faslane on the Gare Loch, is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Devonport and HMNB Portsmouth). It ...
The former Royal Navy Police Special Investigation Branch, with offices at HMNB Portsmouth and HMNB Devonport,
was disbanded in December 2022, and replaced by the new tri-service
Defence Serious Crime Unit.
Recruiting and training
Historically, the Royal Navy Police recruited internally, however from 2018 it has been possible to apply directly as a civilian. In addition to the standard recruitment process, Candidates undertake a suitability assessment during the Royal Navy Acquaint Centre stage of application. On completion of training, candidates are rated as leading hand, or corporal.
Further professional training is delivered at MOD Southwick Park, or through
territorial police forces
A territorial police force is a police service that is responsible for an area defined by sub-national boundaries, distinguished from other police services which deal with the entire country or a type of crime. In countries organized as federation ...
, and is required for later advancement to
petty officer
A petty officer (PO) is a non-commissioned officer in many navies. Often they may be superior to a seaman, and subordinate to more senior non-commissioned officers, such as chief petty officers.
Petty officers are usually sailors that have ...
or
sergeant
Sergeant (Sgt) is a Military rank, rank in use by the armed forces of many countries. It is also a police rank in some police services. The alternative spelling, ''serjeant'', is used in The Rifles and in other units that draw their heritage f ...
,
master at arms (MAA) or
colour sergeant
Colour sergeant (CSgt or C/Sgt) is a rank of non-commissioned officer found in several armies and marine corps.
Australia
In the Australian Army, the rank of colour sergeant has only existed in the Corps of Staff Cadets at the Royal Military ...
or
warrant officer class 1.
Commissioned officers
An officer is a person who holds a position of authority as a member of an armed force or uniformed service.
Broadly speaking, "officer" means a commissioned officer, a non-commissioned officer (NCO), or a warrant officer. However, absent c ...
in the specialisation are drawn from within, with candidates considered suitable for commissioning via the
senior upper yardman scheme as officers of the
warfare branch of the Royal Navy or as officers of the Royal Marines.
Dress
The trade badge for Royal Navy Police is a
crown
A crown is a traditional form of head adornment, or hat, worn by monarchs as a symbol of their power and dignity. A crown is often, by extension, a symbol of the monarch's government or items endorsed by it. The word itself is used, parti ...
(worn in a wreath by Masters-At-Arms).
When undertaking General Police Duties (GPD), RNP will wear Rig 22 with combat boots. They will also wear a black stab vest, or high-visibility equipment vest or both, or hi-visibility jacket marked with "RN POLICE" or "ROYAL NAVY POLICE" and a dark-blue beret.
With the introduction of the Rig 22, this uniform was adopted as the standard patrol attire.
GPD equipment
In addition to a stab vest, RNP will carry an expandable Monadnock baton, speedcuffs, a
TETRA radio with earpiece (on the secure
Airwave network) and limb restraints.
All RNP personnel also wear the DEMS D5 body camera on their vests, when undertaking GPD.
See also
*
Defence Serious Crime Unit
*
Military police of the United Kingdom
In the United Kingdom, the term military police refers to the three branches of service police, responsible for policing armed forces personnel. The Royal Military Police polices the British Army, the Royal Navy Police polices the Royal Navy, and ...
*
Defence School of Policing and Guarding
*
Offences against military law in the United Kingdom
The main Offences against military law in the United Kingdom are set out in the Armed Forces Act 2006.
The offences fall into two main categories, discipline offences and criminal conduct offences. A second distinction is between those offences ...
*
Royal Military Police
The Royal Military Police (RMP) is the corps of the British Army responsible for the policing of army service personnel, and for providing a military police presence both in the UK and while service personnel are deployed overseas on operations ...
(British Army)
*
Royal Air Force Police
The Royal Air Force Police (RAFP) is the service police branch of the Royal Air Force, headed by the provost marshal of the Royal Air Force. Its headquarters are at RAF Honington, and it deploys throughout the world to support RAF and UK def ...
*
British Indian Ocean Territory Police
*
Ministry of Defence Police
The Ministry of Defence Police (MDP) is a civilian special police force#United Kingdom, special police force which is part of the United Kingdom's Ministry of Defence (United Kingdom), Ministry of Defence. The MDP's primary responsibilities are ...
*
USN master-at-arms and
NCIS NCIS or N.C.I.S. may refer to:
Law enforcement
* National Criminal Intelligence Service, the predecessor to the Serious Organised Crime Agency of the United Kingdom
* Naval Criminal Investigative Service, a United States law enforcement and intelli ...
, the approximate United States equivalents to the RN Police and RN Police SIB.
References
External links
*
Regulating Branch and Royal Navy Police Association
{{Authority control
Royal Navy
Military police agencies of the United Kingdom