The former chief executive of Southern Water, Matthew Wright, alongside three other former employees, has been charged with conspiracy to defraud regulators in relation to alleged manipulation of sewage wastewater testing between 2012 and 2017. The charges, brought by the Environment Agency (EA), accuse the group of orchestrating a scheme to falsify compliance data reported to the EA and the water industry regulator Ofwat, allowing the company to evade millions of pounds in penalties.
The allegations assert that Wright, together with Philip Barker, Clive Massey, and Mark Gregory, conspired to create artificial "no-flow" events at wastewater treatment sites. According to the EA, this involved removing sewage via tankers to produce false testing results, thereby disguising pollution and misleading regulators responsible for protecting the environment. The agency estimates that the alleged fraudulent conduct enabled Southern Water to avoid fines of approximately £45 million, though the regulator’s own calculations suggest a potentially higher figure.
This case marks an unprecedented development in environmental enforcement, being the first instance where a water company CEO has faced criminal prosecution for actions under their leadership. The offence of conspiracy to defraud carries a maximum sentence of 10 years in prison.
The charges follow a lengthy investigation and come after Southern Water was fined a record £20 million in 2021 for illegal sewage dumping. In previous related proceedings, three former employees were convicted of obstructing data collection by the EA in 2019.
Wright and the accused launched a legal challenge contesting the EA’s authority to prosecute them for conspiracy to defraud, arguing that the summons issued was invalid. However, a High Court ruling dismissed this claim and lifted restrictions on reporting the case, clearing the way for a criminal trial scheduled to begin in September at Medway Magistrates’ Court.
Southern Water faces additional charges related to breaches of environmental permit conditions at multiple wastewater treatment works. Three other individuals connected to failure to comply with these permits also face charges.
A spokesperson for Southern Water acknowledged that the charges pertain to a historic period of failure uncovered in 2017 through an internal investigation. The company emphasized that it has since undergone significant cultural and operational reforms under new leadership and ownership, committing to further improvements.
Representing Wright, solicitor Stephen Shergold stated that his client denies all wrongdoing and has cooperated fully with the EA’s investigation. The Environment Agency reiterated its commitment to prosecuting serious environmental offenses and holding both individuals and companies accountable.
Environmental campaigners and officials have welcomed the prosecution, with Environment Secretary Angela Eagle expressing strong support for tough enforcement to protect waterways and signaling future regulatory changes, including plans to end the operator self-monitoring regime that underpinned the alleged misconduct.
The case is being closely watched as a potential turning point in environmental regulation, emphasizing greater personal accountability for executives in the water industry.