How will the Terrorism (Protection of Premises) Act work? 11 June 2025

With extensive experience in the UK private security industry, ESG Security is well positioned to support clients in understanding and preparing for the requirements of the Terrorism (Protection of Premises) Act 2025, commonly known as Martyn’s Law. This legislation is aimed at improving public safety and counter terrorism preparedness across the UK. The Security Industry Authority (SIA) has not yet released detailed compliance information. Once the information is provided we will be ready to provide advice and support to help businesses meet their obligations.

Purpose of the Act

Martyn’s Law requires those responsible for certain public premises and events to take reasonably practicable steps to reduce the risk of terrorism and ensure they are prepared to respond effectively in the event of an attack.

The Act introduces a tiered duty system:

• Standard Duty: Applies to premises where it is reasonable to expect 200 or more people to be present.
• Enhanced Duty: Applies to premises expecting 800 or more people at any one time.

What This Means in Practice

Premises falling under the standard duty, will be required to implement and maintain appropriate public protection procedures. These procedures must address key actions such as evacuation, invacuation (moving people to a safe place), lockdown, and communication with individuals on the premises in the event of a terrorist incident.

Premises subject to the enhanced duty will be required to implement and maintain documented public protection procedures and measures. Due to the higher number of individuals present at enhanced duty premises, the potential impact of a terrorist attack is greater. Those responsible must ensure that appropriate measures are in place:

• Reduce vulnerability.
• Minimise the risk of physical harm.
• Enhance preparedness and response capabilities.

The core responsibility lies with the duty holder – the person or organisation responsible for the premises or event. They must ensure that:

• A terrorism risk assessment is carried out.
• A security plan is developed and maintained.
• Staff are trained to respond to terrorist threats.
• Emergency procedures are in place, including evacuation, invacuation, lockdown, and communication protocols.

The Role of Security Staff

Security personnel are central to the successful implementation of Martyn’s Law. Their responsibilities include:

1. Protection of People and Property

Security staff are trained to identify and respond to suspicious behaviour, helping to prevent incidents before they occur. Their presence provides reassurance and fosters a sense of safety.

2. Deterrence of Criminal Activity

A visible security presence acts as a powerful deterrent to potential criminals, reducing the likelihood of theft, vandalism, and other unlawful acts.

3. Safeguarding Assets

Security teams help protect physical and digital assets by monitoring access points, managing crowd control, and responding swiftly to incidents.

4. Supporting Employee Safety

A secure environment boosts employee confidence and productivity. Staff are more likely to feel safe and supported when trained professionals are on-site.

Emergency Response Procedures

Under the Act, security staff must be trained to implement the following procedures:

• Evacuation: Safely guiding people out of the premises.
• Invacuation: Moving individuals to a secure internal location.
• Lockdown: Securing the site to prevent movement in or out.
• Communication: Coordinating with emergency services and informing the public.