rivers

The failure of the mine-waste dam and resulting mudslide near the town of Mariana killed 19 people and polluted more than 400 miles of rivers.

"The mountains, the glacial rivers, the vast expanse of unspoiled remote landscape are places that Hector would have loved and coming here has made him feel very close as we have travelled through this amazing, inspiring place."

A dam collapse in 2015 at an iron-ore mine run by a firm co-owned by BHP killed 19 people and unleashed a deluge of thick toxic mud into villages, fields, rainforest, rivers and the ocean.

Jennifer Kril, living rivers officer at the trust, said: "It's been years in the making, but finding salmon parr here confirms we have achieved the extraordinary."

Far from the madding crowd, not to mention from the alluring presence of his MI6 handler and former lover, Faith Green, Gabriel works away in his cottage on a travel book about the world’s rivers.