EVENT 4 Men/Women 18 /Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Michael Read | 80 | Sudbury | 2:20.00 |
| 2 | 2 | Patricia Jackson | 74 | East Anglian | 2:05.00 |
| 3 | 3 | Silvia Ferdin | 56 | Co Cambridge | 1:35.00 |
| 4 | 4 | Ian Sempers | 55 | Teddington | 1:26.43 |
| 5 | 5 | Dave Pirrie | 64 | Hemel Hemp | 1:23.50 |
| 6 | 6 | D Pethers | 51 | Basildon Ph | 1:19.67 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | Jeanne Petit | 51 | Leic Peng | 1:15.83 |
| 2 | 8 | Georgina Gardner-Stock | 28 | N'wich Seals | 1:15.02 |
| 3 | 9 | Jo Mitchinson | 42 | Team Luton | 1:14.88 |
| 4 | 10 | Mark Wallman | 45 | Biggleswade | 1:13.81 |
| 5 | 11 | Sian Jones | 22 | Co Cambridge | 1:13.37 |
| 6 | 12 | Manos Georgiadis | 50 | Deben | 1:12.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | William Marsh | 27 | Otter | 1:10.90 |
| 2 | 14 | Elizabeth Bellinger | 43 | Bishop Stort | 1:10.00 |
| 3 | 15 | Ian Wallace | 51 | Brentwood | 1:07.89 |
| 4 | 16 | Maddie Wright | 19 | East Anglian | 1:07.07 |
| 5 | 17 | Charles Sinclair | 25 | Ware | 1:07.00 |
| 6 | 18 | Gina Heyn | 37 | Teddington | 1:07.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 20 | Jake Lloyd | 26 | Harlow Pen | 1:05.00 |
| 2 | 22 | Miranda Nichols | 23 | Mildenhall | 1:02.00 |
| 3 | 24 | James Wardle | 36 | Kenilworth M | 58.50 |
| 4 | 23 | Miroslav Coicici | 30 | GCross Taper | 1:00.00 |
| 5 | 21 | Karsten Bach | 31 | Co Cambridge | 1:04.26 |
| 6 | 19 | Phil Davis | 23 | Norwich Swan | 1:05.30 |