The tragic execution of Akmal Shaikh raises questions not only of the Chinese justice system but also of the treatment of those suffering from mental illness.

There is clear evidence that Mr Shaikh was manipulated into carrying a suitcase containing drugs during an episode of bipolar disorder, or a similar condition, which had left him in a vulnerable mental state.

Yet at no stage following his arrest was Mr Shaikh ever assessed by a psychiatrist. The bizarre behaviour he exhibited in the lead up to his arrest should have caused warning bells to ring early on. But nothing was done. And even when he read a long, rambling and incoherent statement to the court during an appeal hearing, the judges merely laughed and confirmed the death sentence.

The fact that he had no previous diagnosis of a mental illness is not an excuse. The complexity inherent in diagnosing mental illness means that many people only receive a diagnosis later in life, and often only after a particularly severe episode, such as the one from which Mr Shaikh apparently suffered.

It has been reported that the Chinese authorities expected Mr Shaikh himself to prove that he was ill. To suppose that someone in the throes of delusion could make a rational assessment of their own condition simply beggars belief.

This awful tragedy highlights the ignorance of mental illness that still exists in the 21st century, and not just in China. Stigma and ill treatment is sadly still all too common in our country.