The Purple Guide to Health, Safety and Welfare at Music and Other Events — Contingency & Emergency Planning[1]
Summary
Holds that evacuation may pose a greater risk than the incident itself, and that it is generally inappropriate to evacuate on a single unconfirmed alert or for an incident that can be isolated (§101). Preferred posture is containment with movement to areas of relative safety within the site (§102–103), with a two-stage model of relative safety then total safety (§111). Introduces invacuation, dynamic lockdown and self-evacuation as distinct from evacuation, noting all crowded places must now hold such plans (§96, §99, §106). States that where an incident can be localised it is almost always best to keep the core event running (§105), and that mitigation measures must be assessed so as not to increase crowd crush risk (§107). Notes that parents will move against the direction of escape to reach children in crèches, and that arrangements should be explained to them at drop-off (§113). Defines transfer of primacy from organiser to statutory service, including partial primacy where command splits geographically and the organiser retains control of unaffected areas (§80–82). Requires a management structure in mesh rather than pyramid form, with leadership determined by incident type, and provision for decisions when the designated person is outside their competence (§73–74). Cites JESIP joint doctrine (§75). Holds that decisions in extreme situations are judged on what was known at the time, and must be proportionate, necessary and documented with a rationale (§138). Civil Contingencies Act 2004 duties on Category One Responders are summarised (§14–16).
So what
Section 105 will read as counter-intuitive to US clinicians and should be taught deliberately: stopping the show converts a stable distributed crowd into a directed mass moving toward the exits, which is the mechanism behind the crush events our crowd-dynamics domain is built on. Section 113 is a crowd-dynamics finding stated inside a fire-safety section — parental counterflow is a predictable, plannable generator of the conflicting flow that egress models struggle with, and the mitigation is free. Section 82 answers a question US event plans routinely fudge: when the ambulance service declares a major incident, the event medical team does not stop; it keeps running everything outside the cordon while also supplying staff to the incident commander. Section 138 is the standard event medical directors need, because retrospective scrutiny after a bad outcome is almost always outcome-anchored rather than information-anchored.