Martyn’s Law received Royal Assent on Thursday 3 April 2025 – a significant step forward in helping to protect public spaces and events venues.

This legislation, born from tragedy in 2017 and driven by a national campaign for better public safety, introduces a legal obligation for many public-facing businesses to assess and mitigate terrorist threats.

With over two decades of experience supporting commercial public-facing organisations, Greg Lambert, Commercial Director and leading voice on Martyn’s Law at Chubb, has helped businesses strengthen their safety culture and stay aligned with evolving fire and security legislation.

Here, Greg Lambert takes a look at what the law, officially titled the Terrorism (Protection of Premises) Act 2025, entails, who it applies to and how you can prepare and begin to implement it now – not only to remain compliant but to lead with confidence in your industry.

Why Was Martyn’s Law Introduced – and Why Should You Take Notice?

Martyn’s Law is the result of tireless campaigning by Figen Murray following the 2017 Manchester Arena bombing, which claimed the life of her son Martyn Hett. While terrorism may feel like a remote threat, the duty to plan, protect and respond effectively is now becoming a formal responsibility – one that can’t be overlooked.

Chubb Fire and Security supports hospitality operators and public venues with regulatory shifts and best practice and sees Martyn’s Law as a defining moment for how we think about security in the UK.

Who is Affected by Martyn’s Law?

The law introduces a tiered approach to compliance, based on the number of people reasonably expected to be present on-site.

To fall within scope, your premises must:

• Have at least one building
• Be used primarily for a public-facing function (e.g. hospitality, retail, entertainment, healthcare)
• Expect 200+ people to be present at one time (from time to time)
• Not be excluded under Schedule 2, e.g.
  • Transport hubs (e.g., train stations, airports)
  • Parliament buildings
  • Certain open-air spaces and uncontained open land

Events are also covered if they attract 800+ attendees and involve controlled access.

All four criteria must be met for premises to be within scope of Martyn’s Law. If, for example, your premises do not have a building, do not serve a Schedule 1 public-facing function or do not expect 200+ people at once, then you do not fall within scope as a qualifying premises.

What Are the Standard and Enhanced Tiers – and What do They Require?

Standard Tier (200–799 individuals):

• Notify the Security Industry Authority (SIA)
• Implement basic, low-cost public protection procedures
• No mandatory investment in physical infrastructure

Enhanced Tier (800+ individuals or qualifying events):

• All the above, plus:
• Risk assessments
• Physical protective measures (e.g. CCTV, bag checks, vehicle access control)
• A senior individual must be appointed to oversee compliance
• Documented plans must be submitted to the SIA

What Does “Reasonably Practicable” Really Mean in Practice?

This legal test, familiar to those with fire or health and safety responsibilities, ensures that obligations remain proportionate. You’re not expected to invest beyond your means, but you must take logical, effective steps to reduce harm based on your resources and operational context.

This is where expert support can make all the difference. A tailored, risk-based approach will not only help you meet expectations but also demonstrate due diligence in the eyes of regulators.

Who is Considered the ‘Responsible Person’?

For most venues, this will be the person or organisation controlling day-to-day operations. In the case of events, it could be the promoter or managing body with control of the site.

For larger operators, a senior individual must be named – someone who sits at director or partner level and is ultimately accountable for compliance.

What’s the Role of the Security Industry Authority (SIA)?

The SIA will oversee implementation and offer advice and support while ensuring compliance. Enforcement powers will include:

• Compliance notices
• Monetary penalties
• Restriction notices
• Criminal prosecution in severe cases

Implementation is expected to take around 24 months, giving venues time to plan and adjust. However, you shouldn’t wait. Making adjustments now will mean your business and visitors are protected sooner, building trust and enabling you to lead with credibility.

Does the Law Apply Across all Nations of the UK?

Yes. While national security is a reserved matter, the Act applies to England, Wales, Scotland, and Northern Ireland, with collaboration from devolved governments to ensure smooth operation.

What if You Run a School, Church, or Volunteer-led Space?

Special provisions apply:

• Places of worship: Always treated as Standard Tier, even if they exceed 800 visitors
• Schools and childcare facilities: Exempt from Enhanced Tier obligations due to existing safeguarding frameworks
• Volunteer/community venues: Included if they meet the criteria, but judged based on available resources, making the law more adaptable for non-profits

Do You Need to Train Staff Under Martyn’s Law?

While no specific courses are mandated, the law requires that staff responsible for implementing protective measures are appropriately trained or instructed. The emphasis is on real-world readiness, not compliance box-ticking.

How Should You Calculate Attendance Thresholds?

Use any reliable method such as fire safety occupancy limits, historical data, ticket sales or anticipated event capacity. The phrase “from time to time” means that if thresholds are met during busy periods (e.g. weekends, holidays), the law still applies even if those numbers aren’t reached daily.

Will Financial Support be Available?

At present, the Government has no plans to offer direct funding. However, extensive statutory guidance is promised, and expert partnerships can help you deploy smart, efficient solutions.

What if Your Venue or Event isn’t Covered? Should You Still Act?

Absolutely. Martyn’s Law sets a new benchmark, and even venues not formally in scope are being encouraged to adopt its principles. Free resources such as ProtectUK’s eLearning tools and resources are a good starting point.

If your business is open and welcomes the public, then we recommend taking this opportunity to reassess your readiness and strengthen your safety plans.

How Can Digital Tools Help You Comply?

Smart solutions can fast-track your readiness. For example, Chubb’s SafeZone^® is a cloud-based safety app offering:

• Instant emergency alerts to staff and emergency responders
• Geo-location of incidents
• Mass notifications during evacuations
• Seamless communication across large or complex sites

With SafeZone, you can gain control, clarity and peace of mind that your people, property and assets are protected.

Lead With Confidence in a Changing Security Landscape

Martyn’s Law will reshape how the UK manages public safety and presents a chance for businesses to stand out. The best-prepared venues won’t just meet minimum standards, they’ll embed a culture of preparedness, earn the trust of visitors and lead the way in their sectors.

Whether you’re managing a busy hospitality venue or planning large-scale public events, now is the time to act. Not because the law demands it, but because it’s the right thing to do.

Do you need some expert advice on preparing your venue or event for Martyn’s Law? Let’s talk.

Here at Chubb, we can support you with everything from a strategic review of your security to installation of tailored solutions.

For more information about Martyn’s Law, take a look at the Home Office’s factsheet.

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