The rules in United Kingdom
Martyn's Law — Terrorism (Protection of Premises) Act 2025 ↗
Received Royal Assent in April 2025. A standard tier applies to premises and events expecting 200+ people (basic preparedness: evacuation, invacuation, lockdown and communication); an enhanced tier applies from 800+ (documented risk assessment and security measures). Named after Martyn Hett, killed in the 2017 Manchester Arena attack.
The Purple Guide ↗
The Event Safety Guide, maintained by the Events Industry Forum — the recognised good-practice standard for planning safe events, including the DIM-ICE crowd model.
HSE — Managing Crowds Safely (HSG154) ↗
Health and Safety Executive guidance on assessing and managing crowd risk at events.
The Green Guide (Guide to Safety at Sports Grounds)
Capacity, exit and safety standards for sports stadia — a direct legacy of the Hillsborough disaster.
Licensing Act 2003
Premises licences set conditions including capacity and safety for events with alcohol or regulated entertainment.
Festival & Crowd Safety
Crowd density, recognising dangerous surges, clear exit routes, lost-child procedure and working with security.
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