Martyn’s Law (the Terrorism (Protection of Premises) Act 2025) uses a tiered approach to ensure that security requirements are proportionate to the size and nature of a premises.
Standard Tier
Standard Tier refers to premises where between 200 and 799 people are expected to be present at the same time, for example leisure centres, small music venues and small to medium-sized theatres.
Standard Tier requirements focus on preparedness, procedures and staff awareness. Responsible persons must have plans in place for key responses such as evacuation, invacuation, lockdown and communication, and ensure staff understand what to do in the event of a terrorist incident. Most requirements are procedural rather than physical security measures.
Enhanced Tier
Premises and qualifying events where it is reasonable to expect 800+ people fall into the Enhanced Tier, for example stadiums and arenas, large concert venues and major transport hubs.
Enhanced Tier premises must meet all Standard Tier requirements and take reasonably practicable measures to reduce vulnerability to terrorism and the potential for harm. This includes documenting procedures and security measures, assessing vulnerabilities, maintaining appropriate public protection measures, and ensuring ongoing compliance through designated responsible personnel.