| Mark Aldwinckle | 1:40.81 | 1996-03-02 | aged 10 | Age Groups |
| Mark Aldwinckle | 1:36.58 | 1996-05-12 | aged 10 | Haverhill Open |
| Philip Aldwinckle | 1:36.50 | 1999-04-17 | aged 10 | Herts Age Groups 17/4/99 |
| Philip Aldwinckle | 1:36.17 | 1999-04-17 | aged 10 | Herts Age Groups 17/4/99 |
| Martin Jones | 1:28.51 | 2000-04-01 | aged 10 | Herts Age Groups session 6 |
| Ross Mardlin | 1:28.09 | 2002-05-25 | aged 10 | Stevenage Open |
| Liam Doonan | 1:26.34 | 2007-02-10 | aged 10 | Hatfield Valentine Meet |