From Government factsheet updated April 2025.
This Act delivers the Government’s manifesto commitment to strengthen the security of public premises and events.
The Government would like to pay tribute to Figen Murray, mother of Martyn Hett, who was killed in the Manchester Arena attack. Her campaigning has been crucial in driving this Act forward.
The Government intends for there to be an implementation period of at least 24 months before the Act comes into force. This will allow the SIA’s new function to be established, whilst ensuring those responsible for premises and events in scope have sufficient time to understand their new obligations. This will enable them to plan and prepare appropriately.
What does Martyn’s Law do?
The Terrorism (Protection of Premises) Act 2025, 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.
Whilst those that fall within scope of the Act may wish to begin considering the requirements, they should note that guidance will be published in due course. This guidance will assist in understanding 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.
To support enforcement of the regime, a regulator will be established through a new function of the Security Industry Authority (SIA), which will support, advise and guide those responsible for premises and events in meeting the requirements of this legislation.