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It was initially suspected the cause of his death was sudden adult death syndrome, but eight months later Alex's family learned he had taken a substance contaminated with a nitazene.

Coroner Scott Matthewson said the Cambridge graduate had a pre-existing heart condition and died from "sudden adult death syndrome".

He gave the cause of death as acute cardiac arrhythmia - sudden adult death syndrome.

Satish Appleby's son Shaun died from sudden adult death syndrome at the age of 18.

An inquest this week found the aspirant journalist had died of sudden adult death syndrome.