Marilda Lyrio de Oliveira, an Indigenous leader from the area affected by the 2015 Mariana mine dam disaster in Brazil, is pictured outside Britain's High Court in London

Marilda Lyrio de Oliveira, an Indigenous leader from the area affected by the 2015 Mariana mine dam disaster in Brazil, is pictured outside Britain's High Court in London

Australian mining giant BHP will face trial before a British court from April next year to determine how much it must pay in damages to victims of a 2015 dam collapse in Brazil, lawyers said Wednesday.

In one of Brazil's worst environmental disasters, an iron-ore mine run by a firm co-owned by BHP unleashed a deluge of toxic mud into villages, fields, rainforest, rivers and the ocean, killing 19 people.

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