Mass Tort brief
Mass Tort: London Courts Face Multi-Billion Pound Collective Claims
London judges referee battles over the £36bn Mariana Dam trial and diesel emissions appeals as regulators weigh sweeping opt-out class actions.
Mass Tort
The Supreme Court agreed to decide whether water monopolies can be sued by millions of billpayers — threatening to pierce the statutory shield protecting privatized utilities.
BackgroundThe Competition Appeal Tribunal permits opt-out collective proceedings for anti-competitive abuse, but water companies argue section 18 of the Water Industry Act 1991 makes Ofwat the exclusive regulator. The collective action covers millions of household billpayers across England.
- The lawsuits allege Severn Trent, Thames Water, and United Utilities systematically under-reported illegal sewage spills to Ofwat to justify higher consumer utility tariffs.
- Water utilities contend that private collective actions disrupt statutory regulation and jeopardize billions of pounds in planned capital infrastructure investment.
- A Supreme Court finding for billpayers would expose regulated UK utility monopolies to immense opt-out damages claims outside standard regulatory fines.
Mass Tort
The High Court refused to pause the £36B Mariana Dam trial — ordering rival law firms to resolve control of 620,000 claimants without delaying damages hearings.
BackgroundThe collapse of the Fundão tailings dam in 2015 remains Brazil's worst environmental catastrophe, killing 19 people and poisoning hundreds of miles of the Doce river basin. Over 620,000 Brazilian victims brought suit in London against Anglo-Australian owner BHP.
- Pogust Goodhead secured a pivotal liability ruling against BHP, but rival firm Bailey Glasser partnered with Hausfeld to challenge who controls the multi-billion pound damages phase.
- Mr Justice Constable ruled the representation fight must be heard in open court, rejecting bids for closed arbitration that could have stalled the April 2027 trial.
- BHP faces potential liabilities exceeding £36 billion as the High Court prepares to assess compensation for municipalities, businesses, and indigenous communities.
Mass Tort
Lawyers for 1.6 million British drivers returned to court to overturn an emissions defeat-device ruling — fighting to keep £6B in diesel damages alive.
BackgroundFollowing the 2015 Volkswagen emissions scandal, UK claimant firms launched group litigation across dozens of vehicle manufacturers over software that curtailed emissions controls during real-world driving. Lady Justice Cockerill previously ruled that some thermal engine-protection software did not qualify as illegal defeat devices.
- Claimant lawyers argue the High Court's narrow interpretation contradicts European Court of Justice rulings, threatening consumer redress across 1.6 million vehicle owners.
- A parallel quantum trial will assess damages for breach of statutory duty and consumer deception across test cases involving Ford and Renault.
- Automakers have set aside billions in legal defense provisions, warning that expansive damages rulings would distort UK vehicle resale markets.
Mass Tort
Johnson & Johnson's $5.5B US settlement excluded foreign victims — clearing the way for the London High Court to test asbestos contamination in open court.
BackgroundJohnson & Johnson reached a $5.5bn domestic agreement in principle to resolve talcum powder claims across the United States, but the deal explicitly excluded overseas dockets. Thousands of British women who developed ovarian cancer and mesothelioma brought direct group claims in London.
- Mrs Justice Hill ordered initial hearings to determine scientific causation and mineral contamination before any inquiry into corporate knowledge.
- Johnson & Johnson maintains its cosmetic talc was rigorously tested, free of asbestos, and safe, pledging an aggressive courtroom defense.
- City litigation funders view the London talc docket as J&J's most dangerous remaining international mass tort liability following the US carve-out.
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