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NHS England Rolls Out MOSS to Spot Emerging Maternity Safety Risks Nationwide

Built after the East Kent inquiry, the system mandates rapid checks with warnings escalated to boards.

Overview

  • The online Maternity Outcomes Signal System runs seven days a week, analysing routine ward data to flag unusual patterns in near real time.
  • Alerts are traffic-light coded—amber at 95% confidence and red at 99%—and require a critical safety check within eight working days with actions reported to regional and national teams.
  • Signals are visible from ward to trust, ICB, regional and national levels, and hospital executives have been told to discuss them at public board meetings.
  • NHS England says retrospective testing indicates the tool would have signalled problems at units later linked to serious incidents, including East Kent, Shrewsbury & Telford, Leeds and Nottingham.
  • A pilot at Cambridge University Hospitals reported faster responses and stronger senior engagement, and the rollout is being paired with a rapid national investigation and a new maternity and neonatal taskforce.