Data for England & Wales stem from an already completed study covering the years 1988 to 1992 (Barraclough & Harris 1992). Data collection has been based on a national homicide database and on coroner reports, yielding 144 HS incidences including 180 victims.
88% of incidents exclusively involved members of the same family, 9% acquaintances or strangers, and 3% both family and acquaintances or strangers. 75% of victims were female, 85% of suspects male. Of all homicides during 1988-1992, 3% of male, 11% of female and 19% of child deaths occurred in homicide-suicide incidents.
References
Barraclough, Brian & Harris, E.Clare (2002). Suicide preceded by murder: the epidemiology of homicide-suicide in England and Wales 1988-92. Psychological Medicine, 32, 577-584.