| Heat Number - 1 | |||||
| Lane | Comp.No. | Name | A.G. | Club/Country | Time |
| 2 | 2 | Linslade Crusaders SC | Linslade | 4:51.00 | |
| 3 | 4 | Chelmsford SC | Chelmsford | 4:45.30 | |
| 4 | 6 | Cheshunt Swimming Club | Cheshunt | 4:44.53 | |
| 5 | 5 | Hatfield B | Hatfield | 4:45.00 | |
| 6 | 3 | Modernian SC | Modernians | 4:45.83 | |
| 7 | 1 | North Norfolk Vikings | Norfolk Vikg | 4:53.00 | |
| Heat Number - 2 | |||||
| Lane | Comp.No. | Name | A.G. | Club/Country | Time |
| 1 | 8 | Basildon & Phoenix SC | Basildon Ph | 4:36.50 | |
| 2 | 10 | UEA City of Norwich SC | UEA Norwich | 4:32.14 | |
| 3 | 12 | Bishops Stortford SC | Bishop Stort | 4:30.92 | |
| 4 | 14 | City of Peterborough A | Co Peterboro | 4:20.80 | |
| 5 | 13 | West Suffolk Swimming | West Suffolk | 4:29.87 | |
| 6 | 11 | Hatfield A | Hatfield | 4:32.00 | |
| 7 | 9 | City of Peterborough B | Co Peterboro | 4:33.30 | |
| 8 | 7 | City of Cambridge SC | Co Cambridge | 4:38.50 | |