Wessex Water has pleaded guilty to three health and safety offences related to the deaths of three men and a teenage boy in an explosion at its Avonmouth site near Bristol on December 3 2020.
Luke Wheaton, 16, from Bradley Stoke, Ray White, 57, from Portishead, Brian Vickery, 63, from Clevedon, and Mike James, 64, from Bath, died in the incident. In July 2024, Avon and Somerset Police confirmed there was insufficient evidence to pursue a manslaughter prosecution. Earlier this year, the Health and Safety Executive (HSE) announced its intention to bring charges against Wessex Water under the Health and Safety at Work Act 1974.
Guilty pleas entered at magistrates' court
Company representatives appeared before District Judge Lynne Matthews at Bristol Magistrates' Court on Friday, entering guilty pleas to all three charges. The first charge states that Wessex Water failed to ensure the health, safety and welfare of all employees, including Luke, Mr Vickery and Mr White, in relation to risks arising from its use of silos for the storage of treated sewage waste between January 1 2013 and December 4 2020.
The second charge concerns failing to ensure that individuals not in its employment, including contractor Mr James, were not exposed to risks to their health and safety during the same period. The final charge relates to a failure to comply with an improvement notice, served in January 2021, which required the company to demonstrate by March 12 2021 that it had carried out "a suitable and sufficient assessment" of fire and explosion risks arising from dangerous substances at the Avonmouth site.
Case committed to crown court
Judge Matthews adjourned the case to Bristol Crown Court on January 8, saying: "Those guilty pleas have been entered and I commit this matter to the crown court at Bristol for sentence." Emergency services were called to reports of a large blast involving one of the chemical tanks at around 11.20am on December 3 2020. The explosion occurred within a silo containing treated biosolids.
Speaking outside court, Simon Chilcott, an inspector with the HSE, said: "When people go to work, they expect to come home safely at the end of the day. Luke, Ray, Brian and Mike had no reason to suspect that December 3 2020 would be any different. But because of failings by Wessex Water, the unthinkable happened – a catastrophic explosion which claimed four lives and permanently altered many others. The incident at the Avonmouth Sewage Treatment Plant should never have occurred."
Investigation findings and tributes
Mr Chilcott said an investigation by the HSE, supported by Avon and Somerset Police, identified failures which could "all too reasonably have been prevented". He added: "After a detailed investigation, our prosecutors concluded the company had failed to take the appropriate measures to prevent this major incident, which is why we decided to bring them to court so they could be held accountable. Wessex Water Services Limited have today pleaded guilty to three charges under the Health & Safety at Work Act. We recognise 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 tributes issued through police following the tragedy, Luke was described as "the most gorgeous, loving, happy, talented, perfect son". Mr White's family said he was "a wonderful son, brother and father to his two sons", while Mr Vickery's family paid tribute to his "cheeky and wicked sense of humour". Mr James's family described him as a "brother, husband, father and Grampy", adding that he would be missed. Wessex Water will next appear before Bristol Crown Court on January 8.
