Captured in a family video, Harry Hucknall gives a cheeky grin before whizzing off down the street on his new bike. His father, Darren, will never forget the moment — when Harry was seven — and often watches the scene again and again.

It is a precious memory of Harry who, one Sunday evening in September last year, kissed his mother Jane and older brother, David, goodnight before going upstairs to his bedroom and locking the door. He then hanged himself with a belt from his bunk bed.

He was ten years old.

His father blames Harry’s death on two ‘mind-altering’ drugs that his son had been prescribed by a psychiatrist to cure his boisterous behaviour and low spirits.