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| Under-15 Boys 100 Metres HEAT 1 (Kingsmeadow Stadium, 23 May) | 1 | | Harry Grindle | (Belgrave Harriers) | 11.80 | +1.6 | | Q | | 2 | | Michael Miller | (Herne Hill Harriers) | 11.96 | +1.6 | | Q | | 3 | | Daniel Ajayi | (OvGrS) | 12.72 | +1.6 | | | | 4 | | Joshua Dodson | (Guildford & Godalming AC) | 13.07 | +1.6 | | | | 5 | | Nathan Essel | (Herne Hill Harriers) | 13.75 | +1.6 | | | | 6 | | Tolu Ayo-Ojo | (Camberley & District AC) | 13.94 | +1.6 | | | |
| | | Under-15 Boys 100 Metres HEAT 2 (Kingsmeadow Stadium, 23 May) | 1 | | Jamel Powell | (Herne Hill Harriers) | 11.97 | +1.0 | | Q | | 2 | | Oscar Blanchard | (St Mary's Richmond AC) | 12.14 | +1.0 | | Q | | 3 | | Luke Mulley | (South London Harriers) | 12.27 | +1.0 | | q | | 4 | | Lewis Herzog | (Camberley & District AC) | 12.52 | +1.0 | | | | 5 | | Jack Ennis | (Croydon Harriers) | 13.89 | +1.0 | | | | 6 | | Caique Fonseca | (Hercules Wimbledon AC) | 14.94 | +1.0 | | | |
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| Under-15 Boys 100 Metres HEAT 3 (Kingsmeadow Stadium, 23 May) | 1 | | Rami Miller | (South London Harriers) | 11.63 | +3.3 | | Q | | 2 | | Ayo Daniel | (Croydon Harriers) | 12.22 | +3.3 | | Q | | 3 | | Sam Bishop | (Walton AC) | 12.31 | +3.3 | | q | | 4 | | Sindiso Weir | (Herne Hill Harriers) | 13.26 | +3.3 | | | | 5 | | Gbolahan Jimoh | (Herne Hill Harriers) | 13.80 | +3.3 | | | |
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| Under-15 Boys 200 Metres HEAT 3 (Kingsmeadow Stadium, 24 May) | 1 | | Adam Bator-Brown | (Guildford & Godalming AC) | 24.14 | -1.3 | | Q | | 2 | | Ezra Rodrigues | (Croydon Harriers) | 24.65 | -1.3 | | Q | | 3 | | Michael Miller | (Herne Hill Harriers) | 25.00 | -1.3 | | q | | 4 | | Joseph Harmsworth | (Sutton & District AC) | 26.57 | -1.3 | | | | 5 | | Ben Ashmore | (Kingston AC & Polytechnic Harriers) | 27.60 | -1.3 | | | | 6 | | Owen Heard | (Camberley & District AC) | 28.09 | -1.3 | | | | 7 | | Caique Fonseca | (Hercules Wimbledon AC) | 31.09 | -1.3 | | | |
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| | | Under-15 Boys 800 Metres HEAT 3 (Kingsmeadow Stadium, 23 May) | 1 | | Sol Harris - Woodfin | (Kingston AC & Polytechnic Harriers) | 2:14.93 | | | Q | | 2 | | Lloyd Smith | (Hercules Wimbledon AC) | 2:15.06 | | | Q | | 3 | | Jordan O'Dongo | (Croydon Harriers) | 2:16.34 | | | | | 4 | | Ethan Kendall | (Camberley & District AC) | 2:21.90 | | | | | 5 | | Ben Marks | (Walton AC) | 2:25.11 | | | | | 6 | | Harry Mcallister | (Herne Hill Harriers) | 2:27.84 | | | | | 7 | | George Trimm | (Hercules Wimbledon AC) | 2:35.08 | | | | |
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| Under-15 Boys 4 X 100 Metres Relay FINAL (Carshalton, 13 September) | 1 | | Belgrave Harriers | | 46.53 | | | | | 2 | | Epsom & Ewell Harriers | | 50.23 | | | | | 3 | | Sutton & District AC | | DNF | | | | | 4 | | Herne Hill Harriers | | DQ | | | | |
| | | Under-15 Boys 4 X 200 Metres Relay FINAL (Carshalton, 13 September) | 1 | | Sutton & District AC | | 1:40.59 | | | | | 2 | | Herne Hill Harriers | | 1:47.60 | | | | | 3 | | Kingston AC & Polytechnic Harriers | | 1:48.27 | | | | |
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