In a major breakthrough for cross-border group litigation, Pogust Goodhead has secured a resounding victory in its long-running claim against mining giant BHP over the 2015 collapse of the Fundão tailings dam in Mariana, Brazil. The UK High Court has ruled BHP liable for the disaster, which killed 19 people and unleashed a wave of toxic sludge through the Rio Doce basin, displacing entire communities and leaving lasting environmental damage.

According to Non-Billable, the ruling confirms BHP’s liability under both Brazilian environmental law and the Brazilian Civil Code. In rejecting the company’s jurisdictional and limitation defenses, the court made clear that English law recognizes the right of over 600,000 Brazilian claimants to pursue redress in UK courts. The judgment underscores BHP’s operational and strategic control over the Samarco joint venture and found that the company was aware of critical dam defects more than a year before the collapse. The attempt to distance itself through the argument of being an indirect polluter was also dismissed.

This outcome is a critical milestone in one of the largest group actions ever brought in the UK. A trial on damages is now scheduled for October 2026, with case management proceedings set to resume in December.

The win comes amid internal turbulence at Pogust Goodhead, including recent leadership changes and reported tensions with its litigation finance backers, but the firm remains on course to press forward with what could be a multibillion-dollar compensation phase.

A major ruling by the Competition Appeal Tribunal (CAT) has delivered a setback to litigation funder Innsworth Advisors, which unsuccessfully opposed the settlement in the landmark Mastercard consumer class action. Innsworth has been ordered to pay the additional legal costs incurred by class representative Walter Merricks, marking a clear message from the tribunal on the risks of funder-led challenges to settlements.

As reported in the Law Gazette, the underlying class action, one of the largest in UK legal history, involved claims that Mastercard’s interchange fees resulted in inflated prices passed on to nearly 46 million consumers. The case was brought under the collective proceedings regime, and a proposed £200 million settlement was ultimately agreed between the class representative and Mastercard. Innsworth, a funder involved in backing the litigation, challenged the terms of the settlement, arguing that it was disproportionately low given the scope and scale of the claim.

The CAT, however, rejected Innsworth’s arguments and sided with Merricks, concluding that the settlement was reasonable and had been reached through an appropriate process. Moreover, the tribunal found that Innsworth’s intervention had caused additional work and expense for the class representative team—justifying the imposition of cost penalties on the funder.

For the litigation funding sector, this ruling is a cautionary tale. It underscores the importance of funder alignment with claimants throughout the litigation and settlement process, particularly in collective actions where public interest and judicial scrutiny are high.