| Under-15 Girls 100 Metres HEAT 1 (Kingsmeadow Stadium, 15 May) | 1 | | Eleanor Smith-Hahn | (Croydon Harriers) | 13.04 | +0.4 | | Q | | 2 | | Lucy Weir | (Walton AC) | 13.43 | +0.4 | | Q | | 3 | | Kia Watson | (Aldershot, Farnham & District AC) | 13.48 | +0.4 | | q | | 4 | | Safiyya Subjally | | 14.15 | +0.4 | | | | 5 | | Miranda Forrester | (Herne Hill Harriers) | 15.22 | +0.4 | | | |
| | | Under-15 Girls 100 Metres HEAT 2 (Kingsmeadow Stadium, 15 May) | 1 | | Maya Bruney | (Blackheath & Bromley Harriers AC) | 13.07 | -1.8 | | Q | | 2 | | Ashleigh Clarke | (Croydon Harriers) | 13.67 | -1.8 | | Q | | 3 | | Nicola Evans | (Camberley & District AC) | 14.03 | -1.8 | | | | 4 | | Caitlin Haine | (Reigate Priory AC) | 14.14 | -1.8 | | | | 5 | | Seun Ayo-ojo | (Camberley & District AC) | 14.26 | -1.8 | | | | 6 | | Lauren Willis | (Herne Hill Harriers) | 14.53 | -1.8 | | | |
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