After a tussle with close rival, Nottinghamshire's Tesni Ward, who had beaten her in the AAA Indoors event earlier in the year, the 15-year-old Lady Manners student came through to win with a new personal best of 12.66m, and to regain her place at the top of the UK outdoor rankings.

Yasmin's victory ensured her selection for the Home Countries Schools' match at Bedford on Saturday, and the award of her first international vest.

Ed Mourbey, Chesterfield's outstanding pole-vaulter, also added a Senior Boys bronze medal (with a new personal best of 4.60m), to the silver he picked up in the Junior Boys competition in 2005.

He is hoping that this will now be sufficient for the Northern Ireland selectors to confirm his place in the team for the Commonwealth Youth Games in India in October.

Other performances from CDAC athletes, who made up the largest contingent from any of the County's clubs, were:

Junior Boys: James Selvey 10th (ht1) 1500m 4:30.15; Matthew Kirkland 11th pole vault 2.70m; Nathan Melbourne 9th javelin 39.85m. Inter Boys: Robert Scott 14th long jump 5 91m. Senior Boys: Daniel Passey 8th pole vault 4.20m. Inter Girls: Lauretta Curtis 4th 100m 12.29s; Sian Pentin 10th hammer (pool B) 30.61m; Rebecca Baraona 13th javelin 31.97m.

An excellent win at Grimsby moved the CDAC team up to the top of the league after the third match in the Northern Senior League Div. 3EC.

A repeat of this form in the final match at Mansfield next month would see the club make an immediate return to Division Two after relegation last season.

Match result: Chesterfield 383, Sheffield 350, Barnsley 312, Cleethorpes 293.5, Newark 184, Derby 176.5. League table (with one match to play): Chesterfield 15 points, Sheffield 14, Barnsley 12, Cleethorpes 10, Derby 7, Newark 5.

Individual winners (AV denotes Amber Valley athlete):

MEN: Mark Beer high jump B 1.75m; Gary Bostock (AV) 1500m A 4:09.1; Geoff Lowry (AV) 1500m B 4:36.5; Steve Gascoyne 3000SC A 10:32.5; Mitchell Robinson 400m B 53.0s; Ben Mourbey high jump 2.00m, 400mH A 59.7s; Rob Scott long jump B 5.94m; Tom Mitchell 400mH B 71.1s; Peter Favell discus B 36.52m, triple jump A 12.71m. WOMEN: Lauretta Curtis 100m A 12.9s; Louise Feeney (AV) 100m B 14.3s: Lyz Evans 800m B 3:16.0, 3000m B 14:15.5; Hannah Pretty 1500m A 5:54.8, 3000m A 12:24.7; Patrycja Krawczyk pole vault A 2.70m, shot putt B 7.16m; Sarah Tomlinson triple jump B 10.01m; Natasha Illingworth triple jump A 10.37m, pole vault B 1.90m.

Recent road results: 26th Historic Hardwick Hall 6, 1st Steve Gascoyne 1st 36:39; Mitchell Robinson (U20) 7th 39:07, 92 finished; Great Bakewell Pudding Junior Run, Emma Erskine 8th 22:10, 80 finished.

Chesterfield's young athletes make their final trip, to Middlesbrough, in the last match of the UK Young Athletes League Northern 1 East Division on Sunday, needing a win to be certain of a return to the Premier Division after just one season in the second tier.