Kerry Christie became a double world champion as the Great Britain team enjoyed a superb first day at the Junior and U23 Wildwater Racing World Championships.
The 20-year-old took the U23 women's K1 classic gold medal in the Czech Republic, adding the world crown to the U23 European title she secured in 2022.
And Kerry claimed a second gold with the help of her sister Emma in the U23 women's canoe double to cap a memorable day for the Christie family.
They had a late evening finish after a six-hour storm delay, eventually crossing the line after 9pm.
Yet it was worth the wait, navigating the course in 19min 38.46secs to finish 10 seconds ahead of Swiss pair Hannah Mueller and Mona Clavadetscher and go one better than last year's European U23 silver medal.
In the K1, Kerry finished just ahead of team-mate Lucy Guest (Nottingham) who picked up the bronze for her first international medal.
“It's crazy – I can't really believe it, especially being joint first,” said Kerry.
“I pulled really hard and stuck in – I couldn't have done any more.”
Kerry came into the worlds on the back of fifth place at the European Championships last month and a World Cup top-10 finish, but tried to keep any title thoughts out of her mind.
She added: “It was in my head the whole way and has been the whole year that it was possible, but when I'm racing I just have to put it aside and focus on the performance.”
Lucy went into the championships aiming for a top 10, but had to readjust her expectations after an ‘awful' wait to see what her rivals could manage.
“It's amazing – I'm quite shocked that I actually did that,” she said.
“I knew I was going well and I could get top 10, but I didn't put pressure on myself.
“Because I was the first to go there was a long wait for the other people to come down, but with the next person down there was a massive gap so I knew the time I'd done was pretty quick.
“I'm really happy, I couldn't have given anything else today.”
The opening day at Roudnice Nad Labem was devoted to the classic races over the longer course on the Labe River.
Lucy, 20, was first of the 28 paddlers down the course in the U23 women's K1 and set a daunting pace, clocking 17min 15.74secs.
Ultimately only four would go under 17-and-a-half minutes, and she held on to top spot until Kerry crossed the line, finishing nine seconds quicker than her team-mate in 17:06.64.
A British one-two was still on track with just two to go when high-class paddler Cecilia Panato set off.
As the tension mounted, the Italian, incredibly, clocked the exact same time as Kerry to also claim a gold medal.
Molly Sandercock (Breakout) posted a time of 18:36.14 for 16th place, and Laura Milne (Pinkston Panthers) finished 20th in 19:23.18.
And among the British men, there was a brilliant top-six finish for Leon Tomlinson in the junior men's K1.
Huw Singleton roared to the top of the timesheets, clocking 16min 15.81secs, but he was soon replaced at the summit by fellow Brit, Leon Tomlinson who went seven seconds quicker than his Nottingham clubmate in 16:08.21.
Leon remained in the medal hunt for most of the race and lay third with only five racers to finish.
Yet ultimately he had to settle for an excellent sixth place, just 12 seconds off the podium, with Huw 12th and Samuel Stevely (16:51.02) in a fine 22nd.
“I had a really good start and kept it strong through the rest of the beginning, it was just a little bit of fatigue at the end,” said Leon.
“We were hoping for a sub-16 (minute finish time), ended up with a 16.08, but really good, I put on a good effort.”
Scott Ritchie (Pinkston Panthers), the top British athlete at the senior World Championships last month, finished 36th in a 58-man field with 18:26.89.
Up-and-coming paddlers Iona Patrick, Elsie Landsborough and Ciara Maloney all picked up valuable experience in the championship's opening event – the junior women's K1.
Iona finished in a fine 19th place with a time of 19min 16.68secs, while Elsie posted 22:31.75 for 28th.
The British team fielded exciting prospects Toby Wilde (Frome CC) and Ryan Mallon (CR Cats) in the junior men's canoe.
Both turned in encouraging performances on their international debuts, with Ryan, the Scottish Wildwater Racing champion, clocking 21min 05.87secs for 15th place, and Toby 21st quickest with 22:14.90.
Junior paddler Will Stevely (Forth) raced up a category in the U23s men's K1 and was the fastest Brit down the course in 17min 18.36secs for 30th position in a field of 47.
Toby Peyton-Jones posted 18:10.76 to finish 38th, two places ahead of Regan Toop (18:25.40), while Elliott Massey (22:47.35) completed the quartet in 45th.
In their second race of the day, Molly Sandercock and Laura Milne went in the U23 women's C1.
Molly was 10th-quickest in 22min 39.22secs, a place ahead of her team-mate who clocked 23:24.29.