| Carly Smith-Holmes | 1:35.73 | 1997-03-15 | aged 10 | Age Groups |
| Laura Fitzharris | 1:34.42 | 1999-03-28 | aged 10 | Herts Age Groups 28/3/99 |
| Laura Baker | 1:30.87 | 2000-03-18 | aged 10 | Herts Age Groups session 3 |
| Laura Baker | 1:29.60 | 2000-05-07 | aged 10 | Club Championships 1 |
| Jessica Jackson | 1:29.48 | 2007-11-23 | aged 10 | Hatfield UK Challenge |
| Jessica Jackson | 1:27.79 | 2008-01-26 | aged 10 | Biggleswade Open |
| Jessica Jackson | 1:26.17 | 2008-02-09 | aged 10 | Hatfield UK Challenge |
| Jessica Jackson | 1:25.33 | 2008-06-15 | aged 10 | ASA East Junior Championships Day 4 |