This was a scenario-based study, and not all information could be provided. Participants were advised that if information was not noted, to assume it was normal, many comments suggest they didn’t always comply with this. For example, they wrote ‘possible major pelvis fracture due to mechanism’ or ‘answered “no” to airway and haemorrhage question as unsure’. This means that it is not possible to determine whether a Trauma Unit was selected as it was nearer for a severely injured patient or if the patient was under triaged to this type of facility. The purpose of this evaluation was to test the App against the paper tool to ensure it performs as well. Therefore, comparisons cannot be made with real incidents, as there would be many more factors to consider such as environment, human factors and time pressures.