The Home Office’s Section 27 guidance under Martyn’s Law (the Terrorism (Protection of Premises) Act 2025) provides greater clarity on how the legislation is expected to be applied in practice.
For those responsible for publicly accessible premises and events, it shifts the focus from high-level principle to practical application, setting clearer expectations around how preparedness and proportionate security measures should be embedded within day-to-day operations and supported by structured decision-making.
The guidance also sets out expectations around how risks should be assessed and how duty holders can demonstrate the measures they adopt are reasonable for their specific environment.
Different settings, different expectations
A clear message running through the guidance is that one size will not fit all. The tiered model remains central, separating Standard Tier premises from Enhanced Tier sites and larger events.
For Standard Tier premises, the emphasis is on practical, accessible steps that improve awareness, readiness and basic response capability. For Enhanced Tier premises, the expectations extend further, with more detailed planning and consideration of additional protective measures where appropriate.
Rather than listing prescriptive requirements, the guidance reinforces the importance of judgement. What is considered suitable will depend on the nature of the premises, including its size, occupancy, operating model and the safeguards already in place.
This approach reflects established principles already seen in other regulatory frameworks, where proportionality and context are key to determining compliance.
Operational readiness and the role of joined-up response
With the publication of the guidance, organisations now have a clearer reference point for reviewing how their current arrangements align with the emerging expectations of Martyn’s Law. Although implementation is still ahead, the direction is now well defined enough to support early preparation.
There is a growing emphasis on how effectively organisations can manage information during an incident, how communication flows between teams, and how quickly decisions can be escalated when circumstances change.
These operational factors are becoming central to what “preparedness” means. It is no longer just about having plans in place, but about whether those plans can be acted on quickly and consistently when required.
The guidance places indirect weight on the importance of connected operational processes, where communication, monitoring and response functions work together rather than in isolation. This improves visibility and supports more coordinated action when it matters most.
This reflects a wider shift in expectations across the sector. Security and preparedness are increasingly being viewed as integrated operational functions, where effectiveness depends on how well different elements of a site’s systems and procedures align.
Martyn’s Law is not yet active, but the framework is now taking shape. The Section 27 guidance provides a clearer indication of how proportionality, readiness and practical implementation will be interpreted going forward.
As organisations begin to assess their position, early alignment with these expectations will make future compliance more straightforward and support stronger operational resilience overall.
Amthal is ready to provide guidance and support to organisations as they navigate the implications of Martyn’s Law and prepare for the changes ahead.