EVENT 21 Female 18 Yrs/Over 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Joanne Wiltshire | 62 | Basildon Ph | 1:20.00 |
| 3 | 2 | Agnieszka Beswick | 41 | Newmarket | 53.30 |
| 4 | 3 | Patricia Jackson | 76 | East Anglian | 51.71 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Maria Cunningham | 22 | Potters Bar | 46.12 |
| 2 | 5 | Helen Whittaker | 47 | Huntingdon | 43.52 |
| 3 | 6 | Tracy Dodds | 53 | West Norfolk | 42.66 |
| 4 | 7 | Sarah Southall | 56 | Impington | 41.26 |
| 5 | 8 | Anne Vanner | 51 | Newmarket | 36.15 |
| 6 | 9 | Charlotte Odell | 20 | Co Norwich | 36.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Lucy Gee | 23 | Co Norwich | 35.79 |
| 2 | 11 | Emily Rose | 24 | Diss Otters | 35.47 |
| 3 | 12 | Louise Barker | 46 | Co Ely | 35.31 |
| 4 | 13 | Katrina Farrall | 53 | Basildon Ph | 35.25 |
| 5 | 14 | Kimberley Harrison | 42 | Stowmarket | 35.00 |
| 6 | 15 | Nicola Russell | 46 | DunmowAtlant | 34.73 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Molly Peacock | 21 | West Suffolk | 33.99 |
| 2 | 19 | Sian Jones | 24 | Co Cambridge | 33.31 |
| 3 | 21 | Alexandra Heard | 23 | Co Norwich | 30.00 |
| 4 | 20 | Anna Rumley | 18 | Flitwick | 33.10 |
| 5 | 18 | Kathleen Owen | 35 | Hadleigh | 33.72 |
| 6 | 16 | Olivia Lillywhite | 27 | Biggleswade | 34.71 |