The Environment Agency has begun criminal proceedings against four former Southern Water employees, including former chief executive Matthew Wright, charging them with conspiracy to defraud. This means the agency believes these individuals worked together to deceive someone, likely regulators or customers, for some improper benefit connected to the company's operations.

Water companies are regulated because failures in how they report or manage issues like sewage discharges can have serious consequences for public health and the environment. A conspiracy to defraud charge suggests the case goes beyond simple mistakes and involves allegations of deliberate wrongdoing at a senior level, which is why the matter has moved into criminal court rather than being handled through fines or civil penalties alone.