| Leah Reeves | 1:32.60 | 1996-11-13 | aged 10 | unknown fixture |
| Helen Miles | 1:23.70 | 1997-09-28 | aged 12 | unknown fixture |
| Claire Shannon | 1:21.44 | 1998-06-27 | aged 12 | Potters Bar open |
| Claire Shannon | 1:20.92 | 1998-09-26 | aged 12 | Harlow open |
| Claire Shannon | 1:16.28 | 1999-01-22 | aged 12 | Potters Bar IM meet |
| Ruth Pay | 1:15.80 | 2002-03-17 | aged 12 | Age Groups 7 & 8 |