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Diesel Leak Costs Firm £4M After River Pollution
15 Apr
Summary
- Firm paid £3.8 million for infrastructure upgrades and a £350,000 sanction.
- Diesel from a failed valve polluted the River Test near Southampton in 2021.
- Hampshire Wildlife Trust reported birds covered in fuel oil and dead wildlife.

A prolonged river pollution incident, which devastated a nature reserve and garnered public attention from notable figures, has resulted in a significant financial outlay for a company. Diesel entered the River Test from a Watson Fuels site near Southampton in 2021, causing considerable environmental damage.
The Hampshire and Isle of Wight Wildlife Trust documented severe pollution, with birds found coated in fuel oil and evidence of dead fish and cygnets. This situation persisted for months before authorities identified the source.
The Environment Agency attributed the leak to a faulty underground valve at the Watson Fuels facility. Although initial remedial actions were taken, heavy rainfall subsequently caused the diesel to flow into the river, harming wildlife.
As a consequence, Watson Fuels has committed £3.8 million towards infrastructure improvements, including a site rebuild, and paid a £350,000 sanction to the Wessex Rivers Trust for environmental enhancements. The company also covered the Environment Agency's investigation costs.