Brazil Dam Case: UK Appeal Loses; BHP Liable, Damages Trial Set

What's happened

The UK Court of Appeal has refused BHP’s bid to challenge a High Court ruling on the Mariana dam disaster. The decision confirms BHP’s liability under Brazilian law and sets the stage for a further damages trial, with proceedings expected to begin in 2027 for damages and 2024 for the October trial in London.

What's behind the headline?

Analysis

The Court of Appeal’s decision solidifies that BHP remains liable under Brazilian law, potentially accelerating UK-group actions.
The ruling leaves unresolved issues on damages quantum and the scope of claims, setting up a second stage trial in April 2027.
This update signals a broader trend of cross-jurisdictional litigation after environmental disasters, with claimants seeking compensation across borders.
Readers should watch for how UK claimants’ costs and interest on damages will be resolved in the expedited phase slated for October.

Forecast: Damages awards in the UK action are likely to be determined in 2027, with total compensation potentially influenced by prior Brazil settlements and the scope of eligible claimants.

How we got here

The 2015 Fundao dam collapse in Minas Gerais caused 19 deaths and widespread environmental damage. Samarco, a joint venture of Vale and BHP, has faced extensive legal actions in Brazil and the UK. The May 2026 ruling reinforces the tire of Brazilian-law liability and frames ongoing disputes over damages and scope of compensation.

Our analysis

Reuters, The Independent, All Africa provide coverage of the appeals decision and the broader context of the Mariana disaster.

Go deeper

What is the next hearing date for the damages trial?
How many UK claimants are involved and what portion may be affected by the settlement?
Will any new evidence influence future liability or cost allocations?