She was at Cop26 in Glasgow this week, taking part in events with Al Gore, John Kerry and Zac Goldsmith, as well as young climate activists at the Ocean Action Hub.

Stopping industrial fishing in international waters, Earle said, was as important as curbing fossil fuel use.

“It’s the No 1 priority, because we have the chance, in a stroke, to safeguard the blue heart of the planet,” she said. “It’s where most of the oxygen that comes from the ocean is generated. It’s where most of the carbon is taken up.”