Terrorism (Protection of Premises) Act 2025 - Martyn's Law

This page is designed to collate all the information we have on the enaction of Martyn's law, likely to come in to effect mid 2027.

While there is a lot of speculation on what the guidance will be, it is important to remember that there is no way for suppliers and event organisers to be compliant with the act as yet as many of the details and guidance has not been published. Any companies offering compliance advice, or any local authority or event organiser requiring you to provide a 'Martyn's Law Plan' should be directed to the ProtectUK and Home Office sites linked below.

Key information

This information is taken directly from the Home Office fact sheet, published April 2025

What is the 'Terrorism (Protection of Premesis) Act 2025?

The Terrorism (Protection of Premises) Act 20251, also commonly referred to as Martyn’s Law, will improve protective security and organisational preparedness across the UK by requiring that those responsible for certain premises and events consider how they would respond to a terrorist attack. In addition to this, at certain larger premises and events, appropriate steps to reduce vulnerability to terrorist attacks must also be considered. Through the Act, qualifying premises and events should be better prepared and protected, ready to respond in the event of a terrorist attack.
How will it work?

The Act establishes a tiered approach, linked to the number of individuals it is reasonable to expect may be present at the same time at premises and events.  
How will it be enforced?

To support enforcement of the regime, a new regulatory function will be established within the Security Industry Authority (SIA). The SIA will seek to support, advise and guide those responsible for premises and events in meeting the requirements of this legislation. Where there are instances of serious or persistent non-compliance the SIA will be able to take enforcement action including compliance notices, monetary penalties and restriction notices. The legislation also includes some criminal offences. The SIA must prepare statutory guidance about how it will discharge its functions under the Act, which must be approved by the Home Secretary before it is published.   
How will I be supported on Martyn's Law?

Guidance will be provided in due course to assist those in scope to understand the requirements set out in the legislation. The guidance is being designed to be easy to follow, needing neither particular expertise nor the use of third-party products or services. 

The Home Office continues to build on the materials already published in relation to this legislation. This includes a bespoke landing page on Protect UK, Government factsheets which set out key aspects of the legislation, social media promotion, various press releases, media briefings, and our substantial stakeholder engagement campaign. 

Useful Links

ProtectUK - Martyn's Law

Martyn's Law Myth Buster

Martyn's Law Fact Sheet - Home Office