What Powers Do Security Guards Have in the UK?

An SIA licence doesn’t give a security guard police powers. In private security, a guard’s authority comes from ordinary legal rights, limited arrest powers and the occupier’s control of access.

A security guard may request a search or refuse entry, but any intervention needs its own lawful basis. Suspicion alone doesn’t justify detention, a search or force.

Separate permission to work in security from the legal authority to act during an incident.

Key takeaways

• Security guards generally have the same criminal-law powers as other members of the public, not those of a police officer.
• In England and Wales, a citizen’s arrest is limited to qualifying offences and strict necessity when police cannot reasonably make the arrest.
• Searches require consent. Refusal may justify refusing entry, but not detention by itself.
• Restraint and reasonable force need separate legal justification.
• An SIA licence doesn’t authorise compulsory searches, punishment, handcuffs or weapons.
• Arrest law differs across England and Wales, Scotland and Northern Ireland, so UK-wide procedures must reflect those differences.

The key question is what an officer can justify at the time. A breach of store rules, theft and an assault call for different legal decisions.

What powers do security guards have in the UK?

A member of a private security team protects people, property or premises through observation, access control, deterrence, reporting and incident response. “Security guard” and “security officer” do not describe different levels of police authority.

Ordinary legal rights still apply

A guard can act in self-defence, protect another person and take lawful steps to prevent crime. Limited arrest powers may also apply, depending on the jurisdiction and circumstances.

Those rights do not expand because an employer issues a uniform, radio or incident-reporting system. A manager cannot grant police powers through assignment instructions.

Guards also have responsibilities when exercising those rights. An intervention may require an explanation, medical assistance, accurate records and prompt contact with the relevant authorities.

Permission to control premises is different

A property occupier can authorise a guard to check passes, manage visitors, enforce lawful entry conditions and ask unauthorised people to leave.

That authority concerns access to the premises. It does not create a general power to search pockets, demand identification or detain someone for questioning.

Consider each decision separately. Refusing admission may be lawful even where arrest would not be. Asking someone to leave may be justified even where there is no criminal offence.

The guard’s authority also depends on the occupier’s instructions. A contractor should know which areas are private, which routes remain public and who can authorise exceptions.

Where do the rules differ across the UK?

SIA regulation operates across the UK, but arrest law differs between its jurisdictions. Procedures written for one jurisdiction shouldn’t be copied into another without legal review.

England and Wales use section 24A

The main citizen’s arrest provision is section 24A of the Police and Criminal Evidence Act 1984, usually called PACE.

It applies to qualifying indictable offences and includes necessity and police-practicability conditions. These requirements are considered in detail below.

Police have separate powers. A police officer can arrest for a wider range of offences, but those powers don’t transfer to a guard who reports an incident.

Scotland relies on a different legal basis

Private-person arrest in Scotland rests on common law rather than PACE section 24A. Its scope is limited, and it doesn’t permit a guard to hold someone while suspicions are investigated.

Citizens Advice Scotland’s arrest guidance recognises private citizens’ common-law arrest powers and the risk of compensation claims following unlawful arrest.

Scottish assignment instructions need a Scottish legal basis. The phrase “citizen’s arrest” doesn’t make an English procedure applicable.

Northern Ireland has separate legislation

Northern Ireland has its own arrest framework, including the Police and Criminal Evidence (Northern Ireland) Order 1989. England and Wales’ section 24A isn’t the applicable statutory provision.

Reasonable force in preventing crime or effecting a lawful arrest is addressed by section 3 of the Criminal Law Act (Northern Ireland) 1967.

A Northern Ireland deployment should identify the applicable local arrest power and police-handover procedure. The England and Wales checklist below isn’t a substitute.

Across all three jurisdictions, an SIA licence remains a work licence. It doesn’t give a private guard police powers.

When can a guard make a citizen’s arrest?

In England and Wales, section 24A of PACE gives people other than constables a limited power of arrest. A citizen’s arrest is distinct from an arrest by police. Both the offence conditions and the necessity conditions must be satisfied.

A qualifying offence must be involved

For an offence happening at the time, a person may arrest someone committing an indictable offence or someone reasonably suspected of committing one.

For an offence already completed, an indictable offence must actually have occurred. The person arrested must be guilty of it or reasonably suspected of being guilty.

That distinction matters. Reasonable suspicion that an earlier crime occurred is not the same as establishing that an offence was committed.

“Indictable” includes offences that can be tried in the Crown Court, including either-way offences such as theft. It doesn’t mean every offence or every breach of a venue’s rules.

A guard can’t use section 24A simply because someone is rude, refuses questions or declines to follow a non-binding request.

Arrest must also be necessary

The arresting person must have reasonable grounds to believe arrest is necessary to prevent the person causing or suffering physical injury, causing loss or damage to property, or making off before police assume responsibility.

It must also appear that a constable can’t reasonably practicably make the arrest instead.

A guard may detain someone only when the qualifying offence and necessity conditions are met. Preventing someone from leaving doesn’t create an arrest power if the qualifying offence requirement is missing.

Record which necessity ground applied and the facts supporting it. “Suspected shoplifting” identifies an allegation, but doesn’t explain why arrest was necessary.

The need to prevent escape is a condition of the arrest power, not a separate power to arrest someone who walks away before police arrive.

A lawful arrest doesn’t require every guard to intervene physically. Staffing, weapons, bystanders and the possibility of withdrawal remain relevant to a safe response. Preserving evidence and calling police may be the appropriate action.

Must the guard personally witness the offence?

Personal observation is useful evidence, but section 24A in England and Wales doesn’t always require it. The legislation allows reasonable suspicion in defined circumstances.

A guard may receive information through live CCTV, another officer or a witness. Its reliability, detail and link to the person stopped matter.

A radio message saying “someone stole something” provides less support than a clear description of the act, item, location and suspect. The receiving officer should understand the basis for intervention.

For an offence that has already ended, an indictable offence must actually have occurred. A mistaken report to police can create serious problems, even if the guard believed it.

Record what you saw personally and what others reported, then make that distinction clear to police.

A site policy may require continuous observation before a shoplifting arrest. This can be a sensible safeguard, but it isn’t the full statutory test.

The reverse also matters. Seeing someone conceal an item doesn’t automatically meet every condition for arrest.

Evidence supports a decision. It doesn’t remove the need to consider necessity, practicability and safety.

What can a security guard do about shoplifting?

A retail guard handling suspected shoplifting can observe behaviour, preserve CCTV footage, request assistance and approach a customer where appropriate. An unexplained alarm or a person’s appearance alone doesn’t prove theft or justify an arrest.

Establish what happened before intervening

Observation should establish the item selected, any concealment, the person’s movements and whether payment occurred. Keep visible facts separate from assumptions.

Passing the final payment point without paying is often a useful practical safeguard before intervention. It isn’t a universal legal requirement that theft can occur only after that point.

Theft can be complete earlier, depending on dishonest appropriation and an intention permanently to deprive. Equally, placing an item in a bag doesn’t by itself prove shoplifting.

Payment elsewhere, personal property and missed observations can all affect the assessment. An electronic tag alarm gives a reason to investigate, not proof of theft.

Apply the arrest test separately

Even where theft is established or reasonably suspected within the applicable statutory conditions, the guard must assess whether arrest is necessary. Contact police promptly after an arrest.

A threatening person with a weapon presents a different risk from someone who cooperates with a request to resolve an unpaid item. Recovering property shouldn’t override immediate safety.

Follow a policy that states who may intervene, when officers must withdraw and how to request police assistance. Avoid pursuits that expose staff or the public to further danger.

Practical retail loss prevention measures should also address store layout, payment visibility, incident records and staff reporting. Arrest shouldn’t carry the whole responsibility for controlling theft.

Can guards refuse entry or remove trespassers?

A guard acting for the occupier can normally enforce lawful conditions of entry. A private security guard must still comply with discrimination law, contractual rights and any applicable public-access rights.

Refusing admission is not an arrest

A venue may require a ticket, visitor authorisation, age evidence or a consent-based bag search before admission. A person who declines a lawful condition may be refused entry.

Explain the condition and the available choice. Refusing admission doesn’t authorise taking the person’s property or blocking their departure.

Apply restrictions consistently and make reasonable adjustments where required. A general security policy doesn’t override equality duties.

Clear reception access-control procedures should identify who can approve visitors, withdraw permission and resolve disputed access.

Trespass alone usually does not justify detention

Ordinary trespass is generally a civil matter, although some conduct or locations involve criminal offences. Contact the police if you suspect an offence. Being somewhere without permission doesn’t automatically establish burglary, aggravated trespass or another crime.

Ask the person to leave and provide a safe route. Where removal is lawfully justified, any force must remain reasonable and necessary.

The SIA’s guidance on ejecting customers distinguishes entry control and removal from unrestricted physical authority.

Don’t lock someone in an office solely because they ignored an instruction to leave. Any detention must have a valid legal basis before a guard can detain them.

On construction sites or vacant premises, secure restricted areas without obstructing a person’s safe departure. Access controls protect the site; they must not become an improvised detention system.

Can security guards search bags, pockets or people?

A security guard has no general police-style power to conduct a compulsory search. Routine bag and personal checks depend on consent.

A sign stating “bags may be searched” doesn’t give staff an unrestricted right to use force.

Obtain clear consent for the proposed search

Explain the proposed search before starting. Permission to inspect an open bag doesn’t automatically include touching clothing, opening every container or checking a phone.

Consent must be voluntary and limited to the agreed search. If it’s withdrawn, stop.

Where practical, ask the person to present the contents themselves. Use a suitable location and follow procedures for privacy, witnesses, safeguarding and reasonable adjustments.

Don’t conduct intimate searches. An ordinary guarding role doesn’t authorise them.

Employee search clauses also need care. A workplace policy may create employment consequences for refusal, but it doesn’t give a guard a general right to force a search.

Keep refusal separate from detention

A person can refuse a requested search. At an entrance, that may mean they can’t enter under the venue’s lawful conditions.

At an exit, refusal alone doesn’t establish theft or justify detention. A guard can’t detain someone indefinitely just because they refuse.

If separate grounds for a lawful arrest exist, the guard may act on those grounds. Arrest mustn’t be used to manufacture agreement to a search.

A citizen’s arrest doesn’t grant the guard general police search powers. Keep the person safe and request police attendance rather than treating detention as permission to search everything.

Permission to inspect belongings, authority to refuse admission and authority to arrest are three separate questions.

Do emergencies allow a bag search without consent?

An emergency doesn’t create a general search power. Any interference needs a defensible legal basis and must be limited to the immediate danger.

A suspected explosive device isn’t a reason for a guard to open an unattended bag. Stop handling it, move people away and contact police through the emergency procedure.

Don’t inspect the contents to decide whether the threat is genuine. Opening, moving or manipulating the item can increase the danger and disturb evidence.

An unconscious person presents a different situation. Urgent action reasonably necessary to protect life may be justified if the person can’t consent.

A limited search for medical identification or information may sometimes form part of that response. It should follow the first aider’s assessment and emergency-service instructions, not a general security investigation.

Call 999 where required and prioritise breathing, immediate first aid and ambulance access. Follow instructions from police and ambulance staff. Don’t administer medication simply because it was found among someone’s belongings.

Record the emergency, the reason for any interference, who acted and what was found. The justification must relate to protecting the person, not collecting evidence unrelated to their care.

Can a security guard touch or restrain someone?

Physical contact needs a lawful justification. Being caught breaking a rule, refusing a search or arguing with staff doesn’t automatically provide one.

Identify the lawful purpose first

Possible justifications include self-defence, defending another person, preventing crime, making a lawful arrest or lawfully removing someone from premises.

In England and Wales, section 3 of the Criminal Law Act 1967 permits force that’s reasonable in the circumstances to prevent crime or make or assist with a lawful arrest.

The provision doesn’t make an otherwise unlawful arrest lawful. It doesn’t authorise punishment after property has been recovered or danger has passed.

A guard confronted by an assault may act to protect someone. A guard dealing with damage may take reasonable steps to prevent further criminal damage.

Each situation requires an assessment of whether force is necessary and proportionate.

Keep the response proportionate

Reasonable force depends on the circumstances, including the threat, resistance, available alternatives and risks to everyone involved. Training doesn’t make every trained technique appropriate.

Use communication, distance and assistance where these can address the risk. Reduce or stop force when its justification ends.

Restraint can create medical danger. Avoid pressure that interferes with breathing, and request urgent medical help if the person becomes distressed, unresponsive or injured.

Record why contact or the use of force started, what the person did, what force was used and when it stopped. “Minimum force used” is a conclusion, not an account of events. Give the account to police if they investigate.

Excessive force can amount to assault and expose the guard and employer to legal consequences. An initially lawful arrest doesn’t protect later unlawful conduct.

A supervisor’s instruction isn’t a defence for force the circumstances don’t justify.

Can guards carry weapons or handcuffs?

Ordinary private-security work in the UK doesn’t authorise carrying guns, batons, pepper spray, Tasers or other offensive items. An SIA licence gives no exemption from weapons laws.

Weapons laws apply independently

Firearms and noxious sprays are subject to firearms controls. Batons and other items face separate restrictions on possession or carrying.

Calling an item “self-defence equipment” doesn’t make it lawful. Employer permission and a training certificate don’t override criminal law.

Northern Ireland has separate firearms legislation, including exceptional personal-protection arrangements. These don’t give an ordinary SIA-licensed guard an exemption.

Some overseas security roles permit armed guarding. Foreign training, equipment practices and videos don’t establish what a guard may carry in the UK.

The practical default for ordinary guarding is unarmed work supported by communication, observation, safe positioning and police assistance.

Carrying handcuffs does not justify using them

Members of the public, including security guards, can generally possess and carry handcuffs. Using them is a separate legal question.

Restraints may be used during a lawful citizen’s arrest where restraint is necessary and reasonable. They shouldn’t be applied automatically because an arrest has occurred.

Assess the actual risk of violence, escape or injury. A compliant person doesn’t need to be restrained simply because equipment is available.

Officers expected to carry restraints should receive suitable training, supervision and clear instructions. Training should cover legal authority, medical risks, monitoring and release.

Record the specific reason for applying restraints and review the need for continued use. The equipment doesn’t supply its own justification.

What should happen during a lawful detention?

In England and Wales, the following sequence supports a section 24A arrest. It doesn’t replace the requirement to satisfy every statutory condition.

A guard should never describe a person as “only being held” to avoid explaining an arrest. Blocking an exit or making someone believe they can’t leave can amount to detention without handcuffs.

1. Establish the qualifying offence and the information connecting the person to it. Distinguish direct observation, CCTV and witness information.
2. Identify why arrest is necessary and why a police officer can’t reasonably practicably make it instead. Record the facts supporting that decision.
3. Tell the person they’re under arrest and explain the reason in plain language as soon as practicable.
4. Contact police promptly, report that a citizen’s arrest has occurred and describe any violence, weapons, injuries or safeguarding concerns.
5. Use only justified restraint and monitor the person’s condition. Request medical assistance immediately where required.
6. Hand responsibility to police promptly and provide the evidence, witness details and incident account needed to explain the arrest.

There’s no general security-guard equivalent of a police custody time allowance. Calling the police doesn’t authorise an arbitrary period of private detention.

Any decision to detain someone must remain justified and last no longer than lawfully necessary. Keep police informed about delays, changing risks and medical concerns.

Don’t continue holding someone to obtain a confession, finish paperwork or persuade them to pay. Release them if the lawful basis for detention no longer exists.

A private room may reduce public confrontation, but moving someone there needs justification too. Keep arrangements observable, protect safeguarding needs and avoid unnecessary isolation.

The arresting officer remains responsible for their actions until handover. A manager arriving at the scene doesn’t retrospectively authorise an unlawful detention.

What evidence should be handed to police?

A useful handover explains the incident, the grounds for arrest and the actions taken. A recovered item alone may not explain why detention or force was justified.

Preserve the original account

Record the incident time, location, observations, exact words where remembered and the sequence of intervention. Mark estimated times clearly.

Include the reason for arrest, times you contacted police, any search consent, restraint, injuries, first aid and release or handover.

Witnesses should provide their own accounts. Don’t ask staff to agree on a single version or produce matching statements.

Describe gaps and uncertainty clearly. If a guard lost sight of someone, record that gap rather than claiming observation was continuous.

Detailed intruder response and reporting procedures can help distinguish discovery, decision, action and outcome.

Protect footage and physical evidence

Preserve relevant CCTV before automatic deletion, and retain enough context to show events before and after the intervention. Record camera references and any known difference between system time and actual time.

Restrict access and document transfers. Don’t circulate footage through personal messaging groups or publish allegations online.

Identify recovered property and record who handled it. Avoid unnecessary handling, especially if police may need a forensic examination.

The handover should include the incident report, available footage, witness details and relevant physical evidence. Record the receiving police officer’s details and incident reference, if available.

Good evidence management supports accountability for both the suspect’s alleged conduct and the guard’s actions. Both may require investigation.

What does an SIA licence allow?

It permits the holder to carry out defined licensable security activities. It doesn’t certify that every instruction, search or intervention by a security guard during a shift is lawful.

Licensing depends on the actual duties

Contracted guarding work will usually require the relevant front-line licence. Working in a licensable role without the required licence is a criminal offence.

The SIA’s licensing guidance distinguishes activities, employment arrangements and exceptions. Not every person described as “security” requires the same licence.

Some in-house guarding arrangements are treated differently. In-house door supervision can still require licensing, so direct employment is not a universal exemption.

Applicants normally need the relevant licence-linked qualification, identity and criminal-record checks, and the required eligibility. Front-line applicants must be at least 18.

The SIA licence application process should be treated separately from recruitment screening and site induction. Passing a course is not permission to begin licensable work before the required licence is in place.

Display and loss conditions have exceptions

A front-line licence normally must be worn where its front can be seen during licensable work. A separate company badge is not a substitute.

The SIA’s licence conditions include exceptions, such as qualifying covert work and situations where loss or theft has been properly reported.

A lost or stolen licence must be reported to the SIA and police in writing as soon as practicable. Request a replacement through the SIA account process.

Therefore, “visible at all times without exception” is too broad. Equally, an officer can’t choose to conceal the licence simply because display is inconvenient.

Licence compliance concerns the individual. It doesn’t remove the employer’s responsibilities for supervision, staffing and safe procedures.

How do door supervisors’ powers differ?

A door supervisor licence covers a different range of work, not greater criminal-law authority. Door supervisors remain private security personnel.

Match the licence to the activity

A security guard licence commonly covers static guarding, patrols and gatehouse duties. It doesn’t authorise licensable door supervision.

A door supervisor licence is required for relevant guarding work at licensed premises, including controlling unauthorised access and preventing disorder. The NPSA’s summary of SIA licences sets out the main categories for each SIA licence.

A door supervisor licence can also cover ordinary security guarding under SIA licence integration rules. A close protection licence can cover certain related work too.

Alcohol sales alone don’t settle every classification. A supermarket selling alcohol for consumption elsewhere isn’t automatically equivalent to a nightclub for licensing purposes.

Additional training does not create police powers

Door supervisor qualifications include role-specific conflict management and physical-intervention training. First-aid requirements also apply within the relevant licensing routes.

Those qualifications don’t authorise forced searches, punishment or unrestricted restraint. The same need for lawful justification remains.

Venue managers retain responsibility for premises-licence conditions, admission arrangements and staffing. Employing licensed door supervisors doesn’t transfer those obligations to the individual at the entrance.

Rota titles also prove little. A person called a host may be performing licensable security duties, while a cloakroom attendant may not be. Assign the correct licence according to the work actually performed.

What should employers put in assignment instructions?

A valid licence sets a regulatory baseline. It doesn’t explain how a particular building, shop or event should operate.

Define decisions and responsibilities

Assignment instructions should set out entry conditions, restricted areas, escalation contacts, police-contact arrangements and limits on intervention.

Explain when a security officer should observe, withdraw, request assistance or consider an arrest. Give them a clear way to reach a supervisor without delaying an emergency call.

Set out consent-based search procedures and guidance for dealing with children, vulnerable adults, language barriers and medical concerns. A generic instruction to “deal with offenders” leaves too much unresolved.

For events, the SIA’s event-security guidance helps distinguish licensable security activities from other event roles. A steward’s title doesn’t determine their legal status.

Monitor more than the licence card

Check that each deployed person’s licence category is active, and manage renewal, suspension and replacement arrangements. A physical card can remain in someone’s possession after their status changes.

Pre-employment screening is separate. BS 7858:2019 covers screening for people working in secure environments, including identity and employment-history evidence. It doesn’t grant additional operational powers.

Employers should assess competence, insurance, supervision, staffing and incident report procedures. Procurement checks should cover the suitability of licensed security personnel, not just possession of a badge.

Have a solicitor review detention, search and restraint policies for each jurisdiction. These decisions can restrict liberty or cause injury, so a copied national template isn’t adequate.

Review incidents where officers withdrew as well as those involving arrest. A justified decision to avoid physical intervention shouldn’t be treated as a failure.

Frequently asked questions about security guard powers

Can a guard demand identification?

A guard can ask for identification to check someone’s age, verify a visitor or apply an entry condition. Private security guards have no general power to compel someone to identify themselves.

A refusal may be grounds to refuse access. It doesn’t automatically justify an arrest, taking someone’s documents or detaining them.

Can guards take a phone or demand it is unlocked?

A guard has no general power to seize a phone, demand a passcode or inspect messages. Agreeing to enter premises doesn’t automatically give a guard access to digital content.

If a phone may contain evidence, preserve any information available and involve the police. Any immediate action to prevent harm needs separate justification.

Can a guard hold someone until they pay?

A guard can’t detain someone just to collect a debt, obtain a civil recovery payment or secure an admission. Any arrest must meet the applicable legal conditions.

A lawful arrest doesn’t allow a guard to negotiate payment in exchange for release. Keep reporting and debt recovery separate.

Can someone complain about unlawful detention or force?

Yes. Report immediate danger through 999 and non-emergency allegations through 101 or the relevant police reporting route.

Keep receipts, witness details, photographs of injuries and a prompt written account. Complaints can also go to the security employer, premises operator and, where relevant, the SIA. A solicitor can advise on compensation.

Must a guard arrest someone they see offending?

No. Private guards don’t have to make every available citizen’s arrest. Their role commonly centres on deterrence, observation, reporting and protecting people.

Workplace instructions can’t require an unlawful act. If intervention would create unacceptable danger, withdraw, preserve evidence and contact the police promptly.

Conclusion: make every intervention legally accountable

A security guard’s powers in the UK depend on the action, circumstances and jurisdiction. A uniform, licence or employer instruction cannot replace the lawful basis for a citizen’s arrest, search or use of force.

Keep consent separate from compulsion, entry control separate from detention, and training separate from legal authority. Record the facts behind each intervention and involve police promptly after an arrest.

A clear account should explain what happened, why the guard acted and where their authority ended.