FINN Trehane took his tally of national qualifying times (NQTs) to nine as he led a medal spree by Bournemouth Collegiate School swimmers at Bristol.
The 12-year-old struck gold in the 100m breaststroke, silver in the 200m backstroke and 400m individual medley (IM) and bronze in the 100m backstroke and 400m freestyle during the second weekend of the South West Age Group Championships.
All his times were NQTs and he is now ranked among the top two 12-year-olds in Britain in five events and in the top 10 in nine.
BCS team-mate Zoe Gannaway now has a full set of NQTs in the freestyle events after winning silver in the 13yrs 400m freestyle and bronze in the 200m.
She is also qualified to swim the 100 and 800m in Sheffield this summer.
Grace Kingsley missed her NQT by 0.3sec as she won bronze in the 14yrs 200m backstroke.
Bronze also went to BCS's Christian Tai in the 13yrs 400m IM, while Leonie Derapeter, Henry Bramwell-Reeks and Alesha Gibson all made finals.
Harriet Perfect led a seven-medal haul for Swim Bournemouth at Bristol with gold in the 14yrs 100 and 200m backstroke.
Jemma Green added two silver medals and a bronze to her regional collection, coming second in the 14yrs 200 and 400m freestyle and lowering her 400m NQT by more than a second.
She was also fourth in the 100m backstroke and shared a bronze medal after anchoring 4x100m freestyle relay team-mates Morgan Long, Megan Leaper and Jess Richens to third place.
Their split-times were, respectively, 1:03.1, 1:03.1, 1:01.1 and 59.4.
This is one of five teams that Swim Bournemouth believe have qualified for the national age groups.
Kelvin Wong also won silver as he lopped another second off his NQT with a time of 1:14.86 in the 100m breaststroke.
Henry Stanbrook won bronze in the 100m backstroke in 1:03.9 and reached the 200m back final, placing seventh in 2:20.34.
Ollie Fairman came within one place of the podium three times as he touched fourth in the 100 and 200m backstroke and 100m breaststroke.
Other Swim Bournemouth finalists included Ben Samuel with fifth in the 13yrs 200m freestyle (2:10.39) and Issy Pryce, Matt Collins and Hannah Stonier, who were seventh in the 100m breaststroke, 200m freestyle and 200m freestyle respectively.
Three other Swim Bournemouth relay teams also made finals.
The girls' 4x100m medley team of Perfect, Pryce, Jess Richens and Green came fourth in 4:35.76.
The boys' 4x100 freestyle team of Ben Samuel, Kelvin Wong, Ethan Bell and Matt Collins were fifth in 3:58.71 and the medley team of Ethan Bell (1:13.4), Wong (1:15.9), Collins (1:03.88) and Samuel (59.69) were eighth in 4:33.20.
Seagulls' Amy Mills narrowly missed out on a second breaststroke final as she came 10th in the 13yrs 100m event in 1:23.58, a personal best time by 0.32sec - one of eight long-course PBs for the Christchurch club's seven swimmers at Hengrove Park.
Nathan Gerrard, recovering from illness, sliced two seconds off his PB to come 14th in the 10-11yrs 100m backstroke in 1:21.09.
Anashe Chisadza hit top form, lopping 16 and four seconds respectively off her 400m IM and 100m backstroke times to come 15th and 20th in the 12yrs age group.
Chisadza, Mills, 12-year-old Abbie Peckham and Abbie Noyce, 14, came 19th in the 4x100m freestyle relay - a good result against the West's best 14 and under teams.