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Former Southern Water CEO among four facing UK prosecution over wastewater monitoring allegations

By Thomson Reuters Jul 22, 2026 | 7:19 AM

LONDON, July 22 (Reuters) – Britain’s Environment Agency said on Wednesday it was bringing a fraud ​case against four former ‌Southern Water employees, including former Chief Executive Matthew Wright, over allegations they manipulated wastewater testing results.

The regulator said ‌the ​four had allegedly conspired ⁠to defraud the ⁠Environment Agency and water regulator Ofwat between 2012 and 2017 by creating artificial “no-flow” events at ​wastewater treatment works to influence compliance checks.

Southern Water, which has ⁠over 4 million ⁠customers, did not immediately ​respond to a Reuters request for ​comment.

In a judgment published on Wednesday, ‌the High Court rejected Wright’s argument that the Environment Agency lacked the power to prosecute ⁠him for conspiracy to defraud.

The judgment said the Environment Agency alleges the scheme ⁠allowed ‌Southern Water to avoid ⁠penalties of about £45 million ​while ‌the regulator’s own assessment put ​the figure ⁠higher.

The case will now proceed before Medway Magistrates’ Court.

(Reporting by Muvija M and Sam Tobin, writing by Sam Tabahriti, editing by ​Paul Sandle)