If a death requires further investigations you can find out what to do below.
Registering deaths from unnatural causes
If a death is considered unnatural, it cannot be certified by a doctor. A doctor cannot complete a Death Notification Form on behalf of another doctor.
Based on the information available the Coroner will decide if:
a death can be certified without any further action
a post mortem is required to establish further information
a post mortem and an inquest are required
If a death is reported to the Coroner and it is the subject of a post mortem examination or inquest, the death will be registered when the Coroner issues his certificate after the post mortem or inquest.
You can apply for an Interim Death Certificate
until the Coroner finds the cause of death and officially registers the death.