The National Patient Safety Agency (NPSA) is a body that has been established to monitor what it refers to as "adverse incidents" in the NHS.
The NPSA was first proposed in 2001, in a DoH report called Building A Safer NHS For Patients. This document suggested that the agency's "core purpose" would be "to improve patient safety by reducing the risk of harm through error." The final report of the Bristol Royal Infirmary Inquiry, which noted and approved of these proposals, suggested that the NPSA "should be an independent agency to which certain sentinel events are reported so as to be analysed with a view to disseminating lessons throughout the NHS," which "should bring together interested parties to tackle some of the more persistent causes of unsafe practices."
The NPSA now defines its role as "to encourage staff to report incidents without fear of personal reprimand and know that by sharing their experiences others will be able to learn lessons and improve patient safety."