Bicester Blue Fins’ Lottie Wynne-Jones was crowned under 11 butterfly champion at the South East Regional Championships in Crawley.
Wynne-Jones, who is not 11 until later this month, also won silver in the 200m butterfly, as well as breaking four club age group records in her races.
Clubmate Maddy Powell clai-med gold in the ten-year-old 400m freestyle with a huge seven second winning margin, in a club age group record time.
In addition, she also took silver in the 200m butterfly.
The four medal haul for the Bicester Village-sponsored squad was more than any of the club’s much larger rivals from Oxford, Milton Keynes and Aylesbury’s Maxwell.
Freddie Ashley-Sparks, 11, broke three club age group records in his three races.
Twelve-year-old William Whit-ley grabbed two records in his two races.
Tabitha Watkins also shaved 12 seconds from the club’s best time for a 12-year-old girl in the 100m backstroke.
Oliver Inness set two new personal bests in the 13-year-old category.
Head coach Struan McNeil said: ‘This was a brilliant performance from our younger regional swimmers.
“For five of them this was their first taste of competition at this level, so to step up to the challenge by breaking personal bests and club records is testament to their focus and determination.
“Lottie and Maddy were exceptional, and for a small club like ours to have two ten-year-old regional champions is brilliant.
“In 17 races our six swimmers broke 11 club age group records – a sign of the effort all six of them put in.
“We have the potential national swimmers of the future in this squad and I’m personally excited to be working with them.”
The regional championships conclude on June 14-15.