Robyn Larg surfed a wave of about 15ft (4.5m) on the Portuguese coast [Oscar James]An 18-year-old from Scotland has become the youngest British woman to surf huge waves that break off Nazaré in Portugal.
Robyn Larg, from the Isle of Tiree, Argyll, surfed a wave of about 4.5m (15ft) on 15 February.
Her older brother Ben Larg was competing at the same location in the World Surf League Nazaré Tow Challenge.
The score he achieved riding swells of 25-35ft (7.5-10.5m) won him third place.
Robyn said she did not feel too nervous while breaking the record.
The first British woman to tackle the waves was Laura Crane, 29, from north Devon, last year.
Ben and Robyn practised for a few days, before she built up the confidence to be towed out into the giant swell.
Robyn told BBC News: "It's difficult to describe the feeling of letting go of the rope and looking up at the wave.
"I kept getting waves and loved every minute of it."
Ben and Robyn were taught to surf in Tiree by their dad, Marti.
Robyn said her brother had also been a major influence on her surfing career.
She said: "What he has done has gone beyond what we could have thought could have been achieved.
"Coming from a tiny island in Scotland to go and surf the biggest wave in the world with the most accomplished big wave surfers is mind blowing and he has shown me that it's possible."
Ben has been riding the Nazaré surf for years, but this was his first time competing.
The area of coast is recognised as having some of the biggest waves in the world, and only a select few are invited to compete there.
Ben got the call up the night before after US surfer Garrett McNamara dropped out, leaving his last minute entry slot for the Scot to take.
He got paired up with fellow British surfer Andrew Cotton, and they took turns to score as high as they could.
Ben, a 20-year-old Red Bull athlete, said the late entry meant he did not have a chance to potentially spoil his performance by overthinking his tactics.
He secured third place individually and as part of a team.
Ben said: "Honestly, when I look at the rankings online, I don't think it's sunk in yet.
"It's crazy, it feels amazing."
Ben has ambitions to assemble his own team of surfers to tackle the world's biggest waves.The siblings are believed to be the only brother and sister tow team in the world.
Towing involves using a water craft to pull a surfer out to sea to catch fast moving waves.
Ben said he hoped to help Robyn to set more records.
He also plans to assemble a team so he can surf the biggest waves around the world, and try to find some new surfing opportunities in Scotland.
