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How Many First Aiders Does My Event Need?

4 March 2025 Β· 7 min read

A UK guide to calculating event first aid staffing using the Purple Guide and HSG195.

Start with your risk assessment

First aid staffing is driven by your event risk assessment, not a single number. The Purple Guide and HSG195 provide modelling tables, but they assume the assessor has scored crowd, weather, alcohol and event type appropriately.

Typical staffing benchmarks

As a rough indication only:

  • Up to 500 attendees: 2 first aiders
  • 500-1,000: 4 first aiders
  • 1,000-3,000: 6+ responders with a team leader
  • 3,000-10,000: paramedic-led team plus ambulance
  • 10,000+: clinical lead, treatment centre and multiple ambulances

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