Matthew Wright, the former chief executive of Southern Water, faces criminal charges for conspiracy to defraud the Environment Agency and Ofwat. Prosecutors allege Wright and three former colleagues orchestrated a plan between 2012 and 2017 to manipulate water quality tests at treatment works, allowing the company to avoid millions of pounds in regulatory penalties.
Charges of Systematic Manipulation
The criminal proceedings target a specific alleged practice known as artificial no-flow events
at wastewater treatment works operated by Southern Water. According to court documents reported by thesun.co.uk, this method involved restricting the discharge of treated effluent during sampling periods. By creating these no-flow
conditions, the company allegedly avoided the collection of samples that were expected to fail compliance tests.
These tests are central to the operator self-monitoring
(OSM) scheme, introduced in 2009 to track water quality. Under this regime, sampling teams conduct unannounced visits to facilities, and the results are reported to the Environment Agency and the water regulator, Ofwat. KentOnline notes that between January 1, 2012, and December 31, 2017, the accused individuals allegedly bypassed these rules to prevent the reporting of negative results.
“The agency alleges, in the present case, that there was a deliberate plan by officers of the company to manipulate the OSM regime by contriving operational circumstances so that there was no flow through the relevant site at times when it was believed that the site would, or might, fail the OSM test, in order to avoid the consequences of the true OSM result being provided to the agency and Ofwat.”
District Judge Stephen Leake, in his ruling issuing the summons
Legal Challenges and High Court Ruling
The path to these charges was not straightforward. As the BBC reported, Matthew Wright attempted to block the summons, with his legal team arguing in the High Court that the Environment Agency lacked the statutory power to issue such a charge. Wright’s lawyers contended the move was a nullity
, asserting that the agency was restricted to prosecuting environmental offences rather than fraud.
However, that challenge was dismissed on Wednesday by Lord Justice Popplewell and Mr Justice Hilliard. In their 48-page judgment, the court ruled that restricting the agency to environmental charges alone would produce unreasonable and anomalous results
. The judges determined that the agency’s remit enables the EA to prosecute for any offence of any nature in circumstances in which such a prosecution is capable of being calculated to facilitate, or conducive or incidental to, the carrying out of any of its functions
.
Following the ruling, reporting restrictions that had previously shielded details of the legal battle were lifted. The case against Wright, 60, along with Philip Barker, 57, Clive Massey, 64, and Mark Gregory, 63, was scheduled for Medway Magistrates’ Court on July 14.
Broader Regulatory Impact and Financial Stakes
The scale of the alleged deception is significant. Lord Justice Popplewell noted that the case involves carefully planned and extensive fraud and dishonesty at a high level within the company
, including the use of tankers to remove wastewater from facilities to ensure no discharge occurred during testing windows.
This development follows a history of enforcement actions against Southern Water. The company was previously fined £90 million in 2021 for nearly 7,000 incidents of illegal sewage discharge across Hampshire, Kent, and Sussex. Additionally, the utility firm faced a fine of more than £7 million at Canterbury Crown Court in July 2021 for dumping sewage illegally off the Kent coast between 2019 and 2021. Alongside the conspiracy case, Southern Water faces separate, ongoing charges regarding breaches of environmental permit conditions at multiple wastewater treatment works between 2013 and 2017.
With the High Court confirming the Environment Agency’s authority to prosecute for conspiracy to defraud, the focus now shifts to the proceedings at Medway Magistrates’ Court.
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