When Alan Turing died, the reason for his death was cyanide poisoning, and his death was officially ruled as a suicide. See Homosexuality, Conviction and Death
The BBC published an article in which "Turing expert Prof Jack Copeland" argues that his death was plausibly an accident. The article claims that Turing liked to perform chemical experiments as a hobby and may have accidentally poisoned himself with cyanide from an experiment.
Is this article's argument credible, and do most historians agree that it's uncertain how Alan Turing died? Or is it widely agreed that Turing did in fact commit suicide?