Garstang J, Cohen M, Mitchell EA, et al. - In this national survey, researchers identified how British Child Death Overview Panels (CDOPs) and paediatric pathologists classify cause of death for sleep‐related sudden unexpected death in infancy (SUDI) and determined compliance with national requirements for SUDI investigation. An electronic survey of CDOPs and pathologists utilizing three vignettes of SUDI cases highlighting: accidental asphyxia, typical sudden infant death syndrome (SIDS) and SIDS with co‐sleeping. Of 92 CDOPs, 38 (41%) returned questionnaires, and 32 were complete. Classification of deaths varies greatly, with an only limited agreement between the CDOPs and pathologists. Even in typical cases, the terms SIDS and accidental asphyxia are underused.