Spontaneous Incident (SOP) : Incident in relation to which the police have not had prior warning or notification to develop strategies, tactics and contingency plans (in contrast to pre-planned incident)
Cabinet Office, Lexicon of UK Civil Protection: A developing single point of reference for UK Civil Protection Terminology - Version 2.0.1, Emergency Responder Interoperability Lexicon, London, UK 2011. http://www.cabinetoffice.gov.uk/cplexicon, (Emr Mgt - Brit) {545}