| Under-17 Women 300 Metres HEAT 1
(Wimbledon Park, 11 May) | | 1 | | Olivia Hines | (Hercules Wimbledon AC) | 42.0 | | | | | | 2 | | Kamila Braithwaite | (Croydon Harriers) | 42.3 | | | | | | 3 | | Georgina Grant | (Sutton & District AC) | 43.1 | | | | | | 4 | | K Kearey | (Sutton & District AC) | 43.7 | | | | | | 5 | | Claire Heafford | (Epsom & Ewell Harriers) | 45.5 | | | | |
| | | Under-17 Women 300 Metres HEAT 2
(Wimbledon Park, 11 May) | | 1 | | Lucy Mart | (Croydon Harriers) | 44.6 | | | | | | 2 | | J Carpenter | (Sutton & District AC) | 44.7 | | | | | | 3 | | N Gordon | (Sutton & District AC) | 45.3 | | | | | | 4 | | Maria Joslin | (Kingston AC & Polytechnic Harriers) | 45.4 | | | | | | 5 | | Jackie Johnson | (Epsom & Ewell Harriers) | 45.5 | | | | |
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