Five-time Paralympic champion Ellie Simmonds was one of two British winners on the third day of the World Para Swimming World Series meeting in Sheffield.
Simmonds, who won gold medals at Beijing 2008, London 2012 and Rio 2016, won the women's 400 metres freestyle.
The 26-year-old stopped the clock in 5:25.98 to earn 887 points and lead a British one-two-three-four in home water.
Maisie Summers-Newton, 18, was second and Grace Harvey third, with Toni Shaw fourth.
Louise Fiddes was the other British winner of a final, coming out on top in the women's 200m freestyle, earning 728 points versus the 456 of Mexican Darianna Maqueda Andrade.
Dutch star Jonne Moleman continued her domination by winning the women's 50m breaststroke - a fourth victory of the event - with a whopping 1,051 points.
🫂 Sheffield 2021 World Series is going flawless so far thanks to our organizers from @britishswimming.— Para Swimming (@Para_swimming) April 10, 2021
All the necessary measures were taken to keep our athletes safe during the event in these unprecedented times. 😷#StaySafe #ParaSwimming #WorldSeries #Sheffield2021 pic.twitter.com/XORJAnlu83
Briton Leah O'Connell placed second, with 634 points, and Japan's An Nishida was five more behind.
Matz Topkin of Estonia won the men's 50m butterfly and Frenchman Alex Portal triumphed in the 400m freestyle.
In the men's 200m freestyle, Israel's Ami Omer Dadaon collected 914 points to overcome eight Britons and one Japanese swimmer in the final.
Britain's Reece Dunn was second with 899 points and achieved the Paralympic consideration time in the process, with compatriot Jordan Catchpole third.
The season-opening World Para Swimming World Series event is due to conclude tomorrow, with 50m freestyle and 100m butterfly contests scheduled.