ISIO Orugun was the top performer for Dartford Harriers in the first south of England indoor track & field championships meeting of 2012.
After winning her U15 girls sprint heat in a club record time of 43.73s, an effort of 43.79s was good enough to secure top spot in the final for the 13-year-old.
Medals were presented by former Olympic 400m runner Donna Fraser.
Isio was last year's Kent champion in the U13's 75m and 150m.
Sister Naomi finished fourth in both the heat and the semi final of the U17 300m in 44.37s and 45.0s respectively.
Both sisters will compete next weekend in the 200m.
Lucy Hickmott, 16, was second in the heat (64.08s) and fourth in the semi final (65.0s) of the U20 ladies’ 400m.
Elder sister Natalie, 18, was fifth in her heat of the 200m in 26.7s.
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