Wessex Water has pleaded guilty to health and safety charges after an explosion at one of its sites killed four workers, including a teenage apprentice, the BBC reported. Luke Wheaton, 16, Ray White, 57, Brian Vickery, 63, and Mike James, 64, died in the blast in a silo at the company's treatment site in Avonmouth, Bristol, on Dec. 3, 2020. An Avon and Somerset Police investigation into manslaughter was dropped in 2024. The Health and Safety Executive then carried out its own investigation into possible offenses under health and safety law. At a hearing at Bristol Magistrates' Court, Wessex Water pleaded guilty to three charges under the Health and Safety at Work Act: failing, between 2013 and 2020, to ensure the health, safety, and welfare of its employees; failing to ensure the health, safety, and welfare of someone other than an employee; and failing to comply with a health and safety notice issued in 2021.
The explosion took place in a silo containing biosolids, recycled organic matter used by farmers as fertilizer. The four workers were on the roof of the silo when it exploded. The BBC said it is understood that James was a contractor, Vickery and White were Wessex Water employees, and Wheaton was an apprentice at the firm. A BBC investigation found that safety reports had noted serious concerns about conditions in parts of the plant five years before the blast. The documents highlighted a "perfect explosive mixture," "serious risk to personnel," and a smell of gas so strong the authors said they could not stay in the area to finish their report. Wessex Water said it had "robust process controls on site" and that the matters in those reports had been resolved. The company said the reports related to a different part of the site, not the part where the blast happened.
After the hearing, Simon Chilcott, an HSE principal inspector, said the blast "should never have occurred." "When people go to work, they expect to come home safely at the end of the day," he said. "Luke, Ray, Brian and Mike had no reasons to suspect that 3 December 2020 would be any different but — because of failings by Wessex Water — the unthinkable happened." The investigation, supported by the police, found "clear, identifiable failures that could too reasonably have been prevented," he said. He added that the HSE recognized "the importance of this acceptance of guilt by Wessex Water to everyone whose life was shattered by this devastating incident and we hope the result brings them a measure of solace."
In a statement, Wessex Water said: "We accept we fell short of the required standards expected of us at the time and have today pleaded guilty at the first opportunity. Since the tragedy, it has been our priority to implement any changes so that nothing like this ever happens again. However, in the case of Brian, Ray, Luke and Mike we know that this is too little, too late." The firm said it had since established an independent Process Safety Board, created new internal specialist roles, and added training for employees at sites with dangerous substances. Avonmouth has also been registered as a lower-tier Control of Major Accident Hazards site, which brings stricter requirements and inspections. Judge Lynn Matthews referred the "complex and sensitive" case to Bristol Crown Court, with the next hearing due Jan. 8. According to the Sentencing Council, the company could face an unlimited fine. The verified news is a guilty plea and a transfer to Crown Court, not a sentence.