Mass Tort brief
Product Liability Expands to AI as High Court Shapes Group Actions
London judges solidify the £36bn Mariana Dam action and advance talc claims, while the Law Commission targets algorithmic liability.
Mass Tort
The High Court blocked an internal coup in the £36bn Mariana Dam lawsuit — leaving BHP to face one unified trial team demanding record damages.
BackgroundThe 2015 Fundão dam collapse in Brazil unleashed millions of tonnes of toxic mining waste, killing 19 people and devastating river communities. The London proceedings represent the largest collective mass tort action in English legal history after the High Court ruled BHP strictly liable under Brazilian law.
- Mr Justice Waksman ruled that a breakaway claimant committee lacked legal authority to terminate collective conditional fee agreements, protecting claimant cohesion before trial.
- The judgment protects litigation funder Gramercy's investment and clears procedural bottlenecks ahead of high-stakes damages trials scheduled in London.
- BHP faces potential compensation liabilities running into tens of billions of pounds if English judges award substantial individual restitution to affected municipal districts.
Mass Tort
English judges insulated the UK talc group litigation from American settlement maneuvers — forcing Johnson & Johnson to defend its products before a London jury.
BackgroundJohnson & Johnson faces tens of thousands of lawsuits in North America alleging its historic talcum powder products were contaminated with carcinogenic asbestos. UK claimants filed collective proceedings in the High Court under a Group Litigation Order to secure damages under English consumer protection law.
- High Court judge Mrs Justice Hill rejected strike-out applications, structuring foundational Stage 1 trials to determine whether talc caused ovarian cancer and mesothelioma.
- Over 7,000 British claimants have joined the action, with the High Court setting a strict final cutoff date of 18 January 2027.
- Johnson & Johnson and consumer spinoff Kenvue UK deny the allegations, maintaining their talc products were rigorously tested and asbestos-free.
Mass Tort
The Law Commission is rewriting consumer liability law for the digital age — subjecting AI and software algorithms to strict no-fault defect damages.
BackgroundThe Consumer Protection Act 1987 established strict corporate liability for defective manufactured goods, but excluded intangible digital code and software services. Injured consumers currently bear an onerous burden of proving legal negligence when complex algorithmic systems or automated software cause direct harm.
- The proposed legal changes expand the definition of a 'product' to include algorithmic social media features like infinite scroll, AI agents, and digital files.
- The consultation proposes easing evidential burdens of proof for claimants harmed by black-box algorithms and opaque autonomous supply chains.
- The review will determine whether English common law diverges from the European Union's revised Product Liability Directive arriving in December 2026.
Mass Tort
English judges narrowed defeat device definitions to protect carmakers from mass liability — effectively closing the door on 1.6 million UK diesel compensation claims.
BackgroundHundreds of thousands of UK vehicle owners joined group actions alleging carmakers installed illegal software devices to cheat statutory emissions tests. A pivotal High Court ruling earlier this year interpreted EU defeat device rules strictly, throwing out the majority of motorist claims.
- Lady Justice Cockerill reaffirmed that manufacturers' engine protection software did not breach emissions regulations under UK common law, insulating carmakers from mass exposure.
- Claimant solicitors Leigh Day announced plans to apply directly to the Court of Appeal to challenge the diverging standards between British and EU courts.
- A separate quantum damages trial will proceed exclusively against Mercedes-Benz for a limited subset of vehicles where defeat devices were upheld.
Mass Tort
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