Penzance Olympic champion Helen Glover, partnered with rookie Polly Swann, has won the women's pairs at the Rowing World Cup in Sydney.
The new combination, stroked by Swann - who had to miss the Olympics with a back injury - dominated a strong field.
At the first quarter their lead was over two seconds and by the 1000m mark it was up to nearly five seconds - a distance they kept, to beat a strong American crew.
Helen, a former Humphry Davy School pupil whose family own Jelberts ice cream shop in Newlyn, said: "To be honest, I was surprised that we had so much on the field at half way.
"We've moved on each race here and today felt really good."
Her partner Swann underlined the strength of the combination, adding: "It's been great rowing with Helen. She's made it really easy for me."
The rest of Britain's rowers also had a fantastic day on the Australian water, picking up three other golds, a silver and two bronze.