| Lauren Park | 1:36.07 | 1996-11-13 | aged 10 | unknown fixture |
| Leah Reeves | 1:32.60 | 1996-11-13 | aged 10 | unknown fixture |
| Rachel McCormick | 1:24.43 | 1997-09-28 | aged 13 | unknown fixture |
| Helen Miles | 1:23.70 | 1997-09-28 | aged 12 | unknown fixture |
| Tina Bingham | 1:16.68 | 1997-10-11 | aged 14 | Speedo Junior League |
| Claire Shannon | 1:16.28 | 1999-01-22 | aged 12 | Potters Bar IM meet |
| Claire Shannon | 1:15.93 | 1999-07-17 | aged 13 | Bishops Stortford Open |
| Claire Shannon | 1:15.53 | 1999-11-27 | aged 13 | Hitchin Open |
| Claire Taylor | 1:14.78 | 2000-01-22 | aged 13 | Potters Bar Open IM meet |
| Claire Taylor | 1:13.84 | 2000-06-25 | aged 13 | Potters Bar Open |
| Claire Taylor | 1:13.11 | 2000-11-25 | aged 14 | Hitchin Open |