Media releases Midwifery NPEU - National Perinatal Epidemiology Unit LSA - Local Supervising Authority NHS England Safety Influencing ‘Midwives committed to improving safety say RCM on new report’ By RCM on 17 February 2017 Today (Friday 17th February) NHS England have published the findings of the Local Supervising Authority (LSA) Independent National Audit of Supervisory Investigations in England.