How Martyn’s law affects venues and events

The Terrorism (Protection of Premises) Act 2025, known as Martyn’s Law, received Royal Assent on 03 May 2025. It aims to strengthen security at public premises and events across the UK.

There is a 24-month implementation period to give those responsible for venues and events time to prepare. Official guidance will follow, and the Security Industry Authority (SIA) will support those affected in meeting the requirements of Martyn’s Law.

Who is affected and when it applies

The Act introduces a tiered system. It applies to premises where 200 or more people may be present, unless specifically excluded. Sites expecting 800 or more people must follow enhanced duties.

The person responsible under Martyn’s Law is the individual who controls the premises during the event.

Standard tier requirements: 200 to 799 attendees

For events expecting between 200 and 799 people (including staff), the responsible person must notify the SIA. They must also have appropriate public protection procedures in place. These procedures should reduce the risk of physical harm through evacuation, invacuation, lockdown, and communication with people on site.

Enhanced tier requirements: 800+ attendees

At larger events with 800 or more attendees, additional steps are required. Measures must be in place to reduce vulnerability to terrorist attacks and limit harm if an attack occurs. These measures should be documented and provided to the SIA.

Enforcement and compliance

The SIA will take enforcement action in cases of serious or repeated non-compliance. Full details will be available in the upcoming guidance.

Why Martyn’s Law matters

The law addresses long-standing gaps in counter-terrorism preparedness. Until now, this area has lacked the legal structure seen in fields like health and safety. By creating consistent expectations, the law will help improve public protection across the UK.