Event security guide

Event Security & Crowd Management: Planning Safe Events in London

Effective event security starts with a clear risk assessment, named responsibilities and an operational plan that joins venue, organiser and security teams together.

  • Separate the organiser, venue and security-provider roles
  • Plan access, queues, crowd movement and escalation before doors open
  • Build a brief that can be tested, updated and communicated

Event security is the planned control of people, access and foreseeable security risks before, during and after an event. It supports the organiser’s wider safety arrangements; it does not transfer the organiser’s overall duty to manage event safety.

For a London event, the right plan depends on the venue, audience, capacity, timetable, alcohol or entertainment arrangements, public profile and credible threats. A private dinner, retail launch, licensed venue and large public event should not receive the same deployment by default.

Event security officer accompanying guests through a venue
Guest-facing security should be professional, proportionate and connected to a clear escalation plan.

Who is responsible for what?

The event organiser remains responsible for maintaining overall event safety so far as reasonably practicable. The Health and Safety Executive says this includes putting arrangements in place, coordinating work, sharing risk information, ensuring competent people are used, monitoring the event and reviewing the arrangements.

Event organiser

  • Owns the event risk assessment and overall management arrangements.
  • Defines the event profile, capacity, schedule, audience and contractors.
  • Coordinates the venue, production, security, stewarding, medical and fire-safety arrangements.
  • Names decision-makers and makes sure changes are communicated.

Venue

  • Provides accurate information about capacity, entry points, exits, fire procedures, local rules and known site constraints.
  • Explains which areas are controlled by the venue and which are handed to the organiser.
  • Coordinates its existing staff and systems with the event plan.

Security provider

  • Advises on the security tasks within the agreed scope and converts the brief into deployable instructions.
  • Supplies appropriately licensed personnel where the work is licensable.
  • Carries out agreed access control, patrol, queue, crowd-observation, response and reporting duties.
  • Escalates issues to the named event decision-maker and emergency services when required.

A practical event-security planning process

1. Define the event

Record the dates, operating hours, venue layout, expected attendance, audience profile, ticketing or guest-list method, licensed activities, deliveries, contractors, VIP movements and build or breakdown periods. Include what is still uncertain.

2. Assess foreseeable risks

Consider unauthorised entry, disorder, theft, protest, unwanted attention, conflict at entry points, crowd congestion, vulnerable guests, lost persons, suspicious items and disruption to arrival or departure. Assess likelihood and impact, then choose proportionate controls.

3. Design access and movement

Map public and staff entrances, accreditation checks, search arrangements where lawful and agreed, queue lanes, accessible access, delivery routes, restricted areas, emergency exits and vehicle set-down points. Avoid solving one risk by creating a crowd or obstruction elsewhere.

4. Agree command, communications and escalation

Name who can pause entry, refuse admission under the venue’s policy, request police assistance, change a route, stop an activity or begin an evacuation, invacuation or lockdown procedure. Set a radio plan, fallback contact method and plain reporting format.

5. Brief, monitor and adapt

Brief every deployed person on their post, powers, limits, escalation route and emergency actions. During the event, monitor queues, density, atmosphere and operational changes. Record material incidents and decisions.

6. Debrief

Capture what changed, what worked and what should be revised. The HSE recommends a debrief after an event and certainly after a significant incident or a change to venue design or procedures.

SIA licensing: match the licence to the task

Not every event role is licensable, but contracted staff carrying out regulated security activities must hold the correct Security Industry Authority licence. For example, guarding licensed premises against unauthorised access or disorder can require a door-supervisor licence. Check the actual duties rather than relying on a generic job title.

The official SIA guidance explains when a licence is needed, while the public register lets a client check an individual’s licence type and status. Our separate guide explains what an SIA licence shows—and what it does not.

How Martyn’s Law fits into event planning

As of July 2026, most substantive requirements of the Terrorism (Protection of Premises) Act—known as Martyn’s Law—are not yet in force. Current SIA guidance says implementation is expected in spring 2027. Events and premises should use the official scope tests instead of assuming that every gathering falls into a tier.

Where a qualifying event is in scope, the responsible person is the individual or organisation controlling the premises for its use as that event. Tasks may be allocated and specialist advice may be obtained, but official guidance says the responsible person cannot pass on the responsibility itself.

Use our Martyn’s Law preparation guide for the current thresholds, procedures and practical preparation steps. Security support can contribute to a plan, but no provider can declare a client legally compliant on the strength of staffing alone.

What to include in an event-security brief

  • Venue address, floor plan, access points and operating times.
  • Expected attendance, audience profile and peak arrival or departure periods.
  • Ticket, invitation, accreditation and re-entry rules.
  • Restricted areas, assets, performers, speakers or guests requiring specific arrangements.
  • Known concerns, prior incidents and changes since earlier events.
  • Venue policies for entry, searches, prohibited items, alcohol and ejection.
  • Named event, venue, production, medical and security contacts.
  • Emergency procedures, rendezvous points and communications arrangements.
  • Required records, reporting format and post-event debrief.

These details also affect cost. See the security service pricing factors guide for the information a provider needs before producing a meaningful proposal.

Frequently asked questions

How early should event security be booked?

There is no single lead time. Start early enough for the provider to understand the venue, duties and timetable, conduct any required visit and coordinate with other teams. Larger, higher-profile or operationally complex events need more planning time.

Does every event security worker need an SIA licence?

No. Licensing depends on the activity, employment arrangement and setting, not the word “event” in the job title. Contracted personnel carrying out licensable security work need the correct licence; some stewarding or customer-service tasks may not be licensable. Check the SIA’s official guidance for the planned duties.

Who owns the event risk assessment?

The organiser owns the overall safety arrangements and should make sure risk assessments are suitable, coordinated and kept current. Competent contractors can contribute information and specialist assessments for their work, but appointing them does not remove the organiser’s responsibility.

Can a security provider guarantee that no incident will happen?

No. A competent plan can reduce foreseeable risks, improve detection and organise a response, but it cannot remove every risk or guarantee an incident-free event.

What changes should trigger a plan review?

Review the plan when attendance, layout, schedule, audience, weather exposure, transport, licensed activities, VIP arrangements, threat information or contractor responsibilities change. Rebrief affected teams before the revised plan is used.

Sources and further reading

  1. HSE: Managing an event
  2. SIA: Find out if you need an SIA licence
  3. GOV.UK: Check security staff have a licence to work
  4. SIA: Understanding Martyn’s Law and the SIA’s role as regulator

Plan the security operation around your event

Share the venue, date, attendance, timetable and duties you need covered. We can discuss a proportionate event-security scope and the information required for a proposal.