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Understanding Martyn’s Law

What is Martyn’s Law and what it means for your premises can feel overwhelming at first.
We’re here to make it simpler.
Below you’ll find answers to some of the most common questions we’re asked about compliance, assessments, and how Martyn’s Law Services can support you.

If you can’t find the answer you’re looking for, just get in touch – we’re happy to help.

What is Martyn’s Law?

Martyn’s Law (officially the Terrorism (Protection of Premises) Bill) is new legislation designed to make public spaces safer by requiring premises and events to implement proportionate security measures. It is named in honour of Martyn Hett, who lost his life in the 2017 Manchester Arena attack.

Martyn’s Law applies to premises and events that meet certain size and activity criteria.

  • Standard Tier: Premises expecting 200–799 individuals at a time.

  • Enhanced Tier: Premises or events expecting 800+ individuals.

  • Standard Tier applies to premises with a capacity of 200 to 799 people. These premises must implement basic public safety procedures, train staff to respond to threats, and document plans for evacuation, lockdown, and evacuation and communicate effectively. The focus is on practical, low-cost preparedness.
  • Enhanced Tier applies to venues or events with a capacity of 800 or more. These must carry out formal terrorism risk assessments, implement advanced security measures (e.g. CCTV, access control), and designate a senior individual responsible for compliance. They must also submit detailed documentation to the Security Industry Authority (SIA) and ensure scenario-based staff training

The Responsible Person is the individual or organisation who has control of the premises or event – this could be the owner, occupier, or operator. In the case of organisations , a senior responsible individual must be appointed to ensure compliance with the law.

Responsible person are legally required to ensure their premises or events comply with the duties set out in the act once it comes into force.

Reasonably Practicable is a key legal standard term used to determine what protective measures a responsible person must implement. Taking steps that are appropriate to the specific circumstances of the premises or event and considering the nature of activities, the level of risk and the resources available.

The law does not expect every premise or event to implement the same level of security – its about what is appropriate for the size, type and risk level of the premises.

We can advise, guide and support standard tier organisations through their response to Martyn’s Law working through our H.I.V.E Framework

  • Advise guide and support standard tier organisations in preparing and implementing Martyn’s law on their premises.
  • Help organisations understand and apply practical safety measures
  • Empower organisations to protect their staff, visitors and communities effectively

Our pre-assessment helps you quickly understand if your premises or event falls within Martyn’s Law’s scope, and what tier you are likely to be in. It’s a simple first step toward full compliance.

The Security Industry Authority (SIA) will regulate compliance. Failure to comply could result in civil sanctions, fines, or – in serious cases – criminal offences.
But most importantly, failing to plan could risk lives. Compliance isn’t just legal – it’s a moral duty.

At minimum, your public protection procedures should be reviewed annually – or sooner if there are significant changes to your premises, operations, or risks.

Still Have Questions?

Start the conversation — we’re ready to help you protect what matters most.

Are You Ready?

Answer a few quick questions to check your current preparedness level and see how you measure up against Martyn’s Law requirements.

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You are a enhanced tier premises – click next to be redirected to ProtectUK

I don’t need to comply but I want to take action