Guides to planning outdoor event sites

For event organisers, safety officers and local-authority event teams. Each guide says which documents are law and which are guidance, and where every figure comes from. They are not legal advice; for your own event, the Safety Advisory Group, the licensing authority and the duty-holders decide.

• What Is the Purple Guide? Event Safety Explained
  What the Purple Guide is, who publishes it, whether it is law, what its 45 chapters cover, how Safety Advisory Groups use it and how to get your own copy.
• Martyn's Law for Events: Duties and When It Starts
  Martyn's Law for events: the 800-person test, what organisers must do, SIA penalties, and when it comes into force. Not in force as at 20 October 2026.
• Fairground Ride Safety at Events: HSG175 & ADIPS
  Fairground ride safety at events: what HSG175 asks of organisers, how ADIPS inspection and the DOC work, and what to check before a ride is built up.
• How to Draw an Event Site Plan for a SAG
  What a Safety Advisory Group expects on an event site plan: scale, exit widths, emergency routes, capacities, phases and how far ahead councils want it.
• How Many Toilets for an Event? UK Ratios
  How many toilets for an event in the UK: ratios by gate hours, alcohol and camping, plus accessible, hand-wash and crew, and a worked 5,000-person example.
• Event Capacity Calculation and Occupant Density
  In England, standing crowds start at 0.3 m² a person. How to calculate event capacity from usable area, exit widths and escape time, with a worked example.