Ten Croydon Harriers made their mark in Surrey colours last weekend in Southern inter-county fixtures.
At the U13s inter-counties in Kingston on Sunday, Marcia Sey set a new meeting and county record for the 70m hurdles in 11.05 seconds, ranking her number one in the UK for her age group.
Another UK leading performance came in the form of Charles Hagan who clocked 24.29secs in the 200m.
In the high jump, Ugo Ajeh cleared 1.40m for sixth and Breanna Francis matched that feat throwing 8.28m in the A shot putt.
Kayla Bowley completed the Croydon contingent winning the B long jump in 4.65m.
At the U17s meeting in Portsmouth, English Schools finalist Rob Sakala won the 100m hurdles in 13.7secs.
David Olajiga launched himself to third in the UK rankings for the shot putt for his age group, thanks to a 16.20m lifetime best to win the event.
Emma Fossett bagged another win in the B javelin in 37.29m and was also sixth in the A hammer in 37.30m.
Marcelle Rowe notched fourth in the 400m (52.6secs) and Lekan Ogunlana finished sixth in the A javelin in 42.41m.
Off: Marcelle Rowe goes in the 400m
At the season finale of the UK Youth Development League in Harrow, Croydon maintained their Premier Two league status after a fifth place finish.
English Schools finalist Damien Powell took the spoils in the 100m winning in the 11.0secs while Omar Reid enjoyed a double win in the U20 men's discus (40.46m) and hammer (39.47m).
Further wins came courtesy of Daniel Luke (U17 men's 100m, 11.4secs), Luke Wakeling (U17 1,500m, 4:41), Rob Sakala (U17 100m hurdles, 13.6secs) and Stevie Lawrence (U20 women's 1,500m, 4:52).
It was David Olajiga who stole the show however, throwing 16.62m in the U17 men's shot putt, a distance which would have earned him the English Schools title.
At the Elmbridge 10K, Lisa Harris took a huge step to making a successful defence of her Surrey Road League title finishing fourth Surrey runner home in 38 minutes and 55 seconds.
In parkrun action, Croydon had the first two men's finishers at Lloyd Park thanks to Brendan Murphy (first, 17 minutes three seconds) and Ben Savill (second in 17:26).
Stevie Lawrence and Jessica Moore were second and third in the women's category.
Winner: Daniel Luke was fastest over 100m in the final U17s race of the UK Youth Development League season