| Mark Aldwinckle | 1:40.81 | 1996-03-02 | aged 10 | Age Groups |
| Mark Aldwinckle | 1:36.58 | 1996-05-12 | aged 10 | Haverhill Open |
| Mark Aldwinckle | 1:20.91 | 1997-03-15 | aged 11 | Age Groups |
| Greg Lasenby | 1:17.44 | 1998-02-07 | aged 12 | unknown fixture |
| Ian Shannon | 1:16.44 | 2000-03-11 | aged 12 | Herts Age Groups sessions 1 & 2 |
| James Sutherland | 1:15.51 | 2004-11-13 | aged 12 | Speedo League 2 |
| James Sutherland | 1:15.44 | 2004-11-21 | aged 12 | Hitchin Open |
| James Sutherland | 1:14.81 | 2005-01-08 | aged 12 | Herts Major League 1 |
| Jake Robinson | 1:14.15 | 2007-05-26 | aged 12 | Stevenage Open |
| Jake Robinson | 1:13.79 | 2007-06-10 | aged 12 | ASA East Junior Championships |
| Jake Robinson | 1:13.47 | 2007-06-24 | aged 12 | Killerwhales Summer Invitation |