WASHINGTON, D.C. — Documents obtained by the BBC show that a major UK oil refinery exceeded legally‑mandated toxic emission limits at least 27 times between 2022 and 2024, spilling hazardous substances into two rivers and a designated conservation area, according to regulators.

The internal audit, released under freedom‑of‑information rules, lists 15 separate incidents where sulphur dioxide, benzene and heavy‑metal runoff surpassed the Environment Agency’s thresholds. In three cases the waste entered the River Severn and the River Wye, both of which support protected wildlife habitats, while a fourth breach affected a nearby Site of Special Scientific Interest.

England’s Environment Agency has opened formal investigations and warned that fines could total up to £10 million if the refinery is found to have breached the 2023 Pollution Control Act. The agency’s spokesperson said the regulator “will pursue all enforcement options, including civil penalties and potential licence reviews, to protect public health and the environment.”

Investors reacted cautiously; the refinery’s parent company saw its shares drop 3.2 % on the London Stock Exchange after the report surfaced. Analyst Sarah Patel of GreenEdge Capital noted, “Repeated compliance failures raise operational risk and could force lenders to tighten credit terms, especially as ESG criteria become central to investment decisions.”

Environmental NGOs have called for stricter oversight. Campaigner James O’Connor of RiverWatch Britain said, “These repeated violations undermine years of restoration work and demonstrate that current monitoring is insufficient. The government must enforce tougher standards and consider independent audits.”

Key Takeaways

• 27 confirmed breaches of toxic emission limits from 2022‑2024, including spills into two major rivers.
• Potential fines up to £10 million and possible licence reviews by the Environment Agency.
• Share price impact of –3.2 % highlights growing investor sensitivity to ESG compliance failures.

The revelations add pressure on UK policymakers to tighten environmental regulation and on investors to scrutinise the ESG performance of energy assets, as global markets increasingly factor sustainability into risk assessments.