Britain's Alice Tai extended her gold medal tally to six, while New Zealand's Cameron Leslie broke the men's 50 metres freestyle S4 world record at the World Para Swimming Championships in London.
Tai continued to light up the event at the Aquatics Centre in Queen Elizabeth Olympic Park, as she won the women's 50m freestyle S8 race in a championship record 29.55sec.
The British star edged out Brazil's Cecilia Jeronimo de Araujo, who took silver in 30.45, while France's Claire Suipot earned bronze in 30.54.
Britain's 4x100m medley relay 34 points team were also in record-breaking form as they smashed their own world mark, set at the 2016 Paralympic Games in Rio de Janeiro.
Tai, Brock Whiston, Toni Shaw and Stephanie Millward clocked 4min 36.31sec to comfortably beat their challengers in a one-sided relay race.
The United States were second, over 22 seconds behind, while bronze went to Spain.
Leslie was in impressive form as he lowered the 50m freestyle S4 world record, which had stood for 15 years, by 0.40 to 37.14.
The New Zealander, the only individual swimmer to break a world record on the fifth night of the event, beat Takayuki Suzuki of Japan by 0.42.
Russia's Roman Zhdanov did enough for bronze in 39.14.
Belarusian legend Ihar Boki, an 11-time Paralympic champion, clinched his fourth gold medal of the Championships with victory in the men's 200m individual medley S13.
Boki touched the wall in 2:05.04 to outclass the rest of the field.
France's Alex Portal was over seven seconds adrift in silver medal position, while Kyrylo Garashchenko of Ukraine did enough for bronze.
Double Paralympic and Commonwealth Games gold medallist Lakeisha Patterson of Australia added to her growing medal collection by winning the women's 400m freestyle S9 title.
The 20-year-old sealed the third World Championships gold of her career in 4:38.29, just under five seconds in front of Britain's Toni Shaw.
Ellie Cole, also from Australia, took bronze.
Action at the Championships continues tomorrow.