This study evaluated the utility of a voluntary reporting system from several National Health Service trusts. Investigators collected, categorized, and analyzed anonymized data from nearly 29,000 incidents, with the largest proportion related to falls. Discussion includes detailed presentation of the frequency of events, their location of occurrence, and the low rate of incidents associated with a catastrophic outcome. The authors conclude that this type of reporting system can provide useful information on a national level but requires the development of information technology systems to support the efforts.