The Terrorism (Protection of Premises) Act 2025, commonly known as Martyn’s Law, represents a significant change in the UK’s approach to protective security and organisational preparedness.
To help businesses understand the legislation and begin preparing, Corps Intel has produced a new Martyn’s Law Quick Reference Guide. The guide provides a clear overview of the Act, the latest statutory guidance and the practical steps organisations should consider ahead of its expected commencement in spring 2027.
What is Martyn’s Law?
Martyn’s Law was introduced following lessons learned from the Manchester Arena attack in 2017. It aims to improve public safety by requiring those responsible for qualifying publicly accessible premises and events to prepare for potential terrorist incidents.
The Act received Royal Assent on 3 April 2025. Although its substantive requirements are not yet in force, the Security Industry Authority (SIA) expects the legislation to commence in spring 2027.
The legislation establishes two main tiers based on the number of people who may reasonably be expected to be present:
- Standard tier: qualifying premises where 200 to 799 people may be present
- Enhanced tier: qualifying premises and events where 800 or more people may be present
Requirements will be proportionate to the size, circumstances and risk profile of each premises or event.
What does the guide cover?
The Corps Intel Quick Reference Guide brings together the principal areas organisations need to understand, including:
- The background and purpose of Martyn’s Law
- The latest Section 27 statutory guidance
- The distinction between mandatory requirements, recommended good practice and optional measures
- The role and responsibilities of the responsible person
- Competency considerations when making security decisions
- Future SIA notification requirements
- Preparedness, business continuity and organisational resilience
- Contingency planning and recovery
- Links to supporting government and protective security guidance
The guide also explains why compliance should not be treated as a simple checklist exercise. Organisations will need to demonstrate that their arrangements are reasonable, proportionate and appropriate for their particular premises or event.
Preparing for Martyn’s Law
The implementation period gives businesses an opportunity to assess their existing arrangements and address potential gaps before the legislation comes into force.
Initial preparation should include:
- Assessing whether premises or events are likely to fall within scope
- Identifying the responsible person and, where required, a designated senior individual
- Reviewing evacuation, invacuation, lockdown and emergency communication procedures
- Documenting decisions and maintaining a clear audit trail
- Training staff and communicating their responsibilities
- Exercising and reviewing procedures
- Integrating protective security with business continuity and recovery planning
Although the Act does not establish a formal “competent person” role, access to appropriate knowledge and experience can help organisations make proportionate, evidence-based decisions capable of withstanding regulatory scrutiny.
Building resilience, not simply compliance
Preparing for Martyn’s Law should also be seen as an opportunity to strengthen wider organisational resilience.
Effective preparation extends beyond an organisation’s immediate response to an incident. Business continuity, incident management, welfare support, crisis communications and recovery planning all contribute to protecting people and restoring operations safely.
By incorporating Martyn’s Law readiness into existing security and business continuity programmes, organisations can develop a coordinated approach which supports both compliance and long-term resilience.
Download the guide
Download the Corps Intel Martyn’s Law Quick Reference Guide
The guide is intended to support client awareness and readiness planning. Organisations should also refer to the latest Home Office statutory guidance and SIA information about its role as regulator.
How Corps Intel can help
Corps Intel’s Chartered Security Professionals, Intelligence Analysts and Business Continuity Specialists can support organisations with:
- Determining whether premises or events may fall within scope
- Developing appropriate security policies and security strategies
- Producing security risk and threat assessments
- Developing operational and event contingency plans
- Supporting responsible persons and designated senior individuals
- Training operational event security teams
- Reviewing preparedness, business continuity and recovery arrangements
To discuss Martyn’s Law readiness and the support available from Corps Intel, email intel@corpssecurity.co.uk.





