A "very high reading" of hydrogen cyanide in a partially redacted report by the Environment Agency was read out aloud in Zane's fourth pre- inquest.
Seven-year-old Zane Gbangbola, was poisoned to death after floodwaters engulfed the family’s home in Chertsey, Surrey, during the worst storms to hit Britain in 248 years in February 2014.
For months after the tragedy, police and other agencies ruled out his parents’ fears that the lethal gas had come from a nearby landfill site, and insisted carbon monoxide from a faulty pump hired by the family was to blame.

The apparent conspiracy by the UK government and its agencies to conceal the real cause of death of 7-year old Zane Gbangbola may go right up to Prime Minister David Cameron, writes Paul Mobbs. He was chair of the COBRA emergency committee at the time when it appears to have held back the truth that he was killed by cyanide from the toxic landfill site his home was built over.
Almost a year ago I wrote an article for The Ecologist entitled 'death by landfill'.