| 50 m Butterfly | ||||||||||
| Age | Boys | Girls | ||||||||
| 9 | A Beckett | SL | 40.66 | Grantham | 31/03/2007 | A Burr | LV | 39.00 | Grantham | 15/03/2008 |
| 10 | J Strathon | CLP | 36.66 | Lincoln | 13/10/2007 | O Kelsey | LV | 35.17 | Grantham | 15/03/2008 |
| 11 | O Bitowt | LV | 32.48 | Grantham | 31/03/2007 | C McRae | LV | 32.65 | Grantham | 31/03/2007 |
| 12 | O Bitowt | LV | 31.57 | Grantham | 01/03/2008 | G Conlon | LV | 33.17 | Grantham | 15/03/2008 |
| 13 | P Ikhena | Bos | 29.81 | Grantham | 31/03/2007 | L Ballaam | DP | 31.90 | Grantham | 15/03/2008 |
| 14 | P Ikhena | Bos | 27.42 | Grantham | 15/03/2008 | S Allen | LV | 29.74 | Grantham | 31/03/2007 |
| 15 | B Pogson | Bos | 27.79 | Grantham | 15/03/2008 | S Allen | LV | 29.14 | Grantham | 01/03/2008 |
| 16 | K McCallin | Gr | 34.56 | Grantham | 31/03/2007 | |||||
| 17 | L Ruffle | CLP | 29.57 | Grantham | 31/03/2007 | |||||
| 18 | A Mallett | LV | 27.20 | Queens'nd | 19/12/2007 | K Armstrong | Lo | 29.63 | Grantham | 31/03/2007 |
| 19+ | C Pithey | Dp | 26.45 | Grantham | 15/03/2008 | S Smith | Dp | 33.32 | Grantham | 31/03/2007 |
| 100 m Butterfly | ||||||||||
| Age | Boys | Girls | ||||||||
| 9 | ||||||||||
| 10 | S Wainwright | CLP | 1.12.81 | Leeds | 31/07/1982 | C McRae | LV | 1.14.51 | Norwich | 16/04/2006 |
| 11 | O Bitowt | LV | 1.11.09 | Grantham | 24/03/2007 | Je Birkett | CLP | 1.10.47 | Lincoln | 15/11/1986 |
| 12 | D Potts | LV | 1.05.45 | Grantham | 05/03/2005 | T Atkin | CLP | 1.07.08 | Coventry | 08/08/1984 |
| 13 | D Potts | LV | 1.02.31 | Sheffield | 31/07/2005 | E Simmonds | LV | 1.04.22 | Sheffield | 17/10/2004 |
| 14 | P Palmer | LA | 1.00.05 | Maltby | 25/03/1989 | E Harness | CLP | 1.04.31 | Coventry | 09/08/2000 |
| 15 | M Graves | LV | 57.38 | Grantham | 13/03/1999 | S Allen | LV | 1.02.52 | Sheffield | 29/07/2007 |
| 16 | J Graves | LV | 55.86 | Sheffield | 02/08/2001 | T Atkin | CLP | 1.03.61 | Scunthorpe | 11/06/1988 |
| 17 | M Graves | LV | 54.99 | Sheffield | 28/05/2000 | C Wilkie | LV | 1.04.20 | Sheffield | 26/05/2000 |
| 18 | M Graves | LV | 54.64 | Manchester | 11/04/2001 | K Armstrong | Lo | 1.06.17 | Grantham | 17/03/2007 |
| 19+ | J Graves | LV | 54.93 | Manchester | 26/08/2004 | M Marshall | SL | 1.06.28 | Spalding | 10/11/2001 |
| 200 m Butterfly | ||||||||||
| Age | Boys | Girls | ||||||||
| 9 | A Beckett | SL | 3.46.59 | Grantham | 24/03/2007 | |||||
| 10 | J Strathon* | CLP | 3.19.10 | Mansfield | 19/11/2007 | O Kelsey | Gr | 2.56.62 | Grantham | 08/03/2008 |
| 11 | O Bitowt | LV | 2.34.92 | Grantham | 24/03/2007 | C McRae | LV | 2.34.90 | Grantham | 24/03/2007 |
| 12 | C Bitowt | LV | 2.34.09 | Grantham | 24/03/2007 | G Conlon | LV | 2.35.18 | Grantham | 08/03/2008 |
| 13 | D Potts | LV | 2.11.95 | Sheffield | 01/08/2005 | S Allen | LV | 2.20.35 | Sheffield | 15/10/2005 |
| 14 | P Palmer | LA | 2.13.80 | Coventry | 11/06/1989 | J Oldham | LV | 2.20.88 | Grantham | 12/03/2005 |
| 15 | P Palmer | CLP | 2.04.78 | Leeds | 01/08/1990 | T Atkin | CLP | 2.15.22 | Edinburgh | 18/04/1987 |
| 16 | A Mallett | LV | 2.03.54 | Sheffield | 04/04/2006 | T Atkin | CLP | 2.14.17 | Edinburgh | 08/04/1988 |
| 17 | M Graves | LV | 2.03.33 | Sheffield | 09/12/2000 | T Atkin | CLP | 2.12.81 | Orebro | 03/04/1989 |
| 18 | M Graves | LV | 2.03.39 | Norwich | 11/08/2001 | K Armstrong | Lo | 2.24.54 | Grantham | 24/03/2007 |
| 19+ | S Wainwright | CLP | 1.58.23 | Barcelona | 30/07/1992 | J Fannon | CLP | 2.22.48 | Edinburgh | 08/04/1988 |