EVENT 129 Boys 12/13 Yrs 4x50m Medley Team - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | A.G. | Club/Country | Time |
| 0 | 2 | Berkshire & S Bucks | | Berks&SBucks | 2:08.51 |
| 1 | 4 | Scotland East | | Scot East | 2:04.97 |
| 2 | 6 | Oxford & North Bucks | | Ox & N Bucks | 2:04.34 |
| 3 | 8 | Somerset | | Somerset | 2:03.68 |
| 4 | 10 | Scotland West | | Scot West | 2:03.11 |
| 5 | 9 | Dorset | | Dorset | 2:03.57 |
| 6 | 7 | Essex | | Essex | 2:04.08 |
| 7 | 5 | Hertfordshire | | Herts | 2:04.68 |
| 8 | 3 | Nottinghamshire | | Notts | 2:05.76 |
| 9 | 1 | Scotland North | | Scot North | 2:13.11 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | A.G. | Club/Country | Time |
| 0 | 12 | Staffordshire | | Staffs | 2:02.25 |
| 1 | 14 | Surrey | | Surrey | 2:01.28 |
| 2 | 16 | Hampshire | | Hampshire | 2:00.66 |
| 3 | 18 | Cheshire | | Cheshire | 1:58.09 |
| 4 | 20 | Lancashire | | Lancashire | 1:57.23 |
| 5 | 19 | Middlesex | | Middlesex | 1:57.68 |
| 6 | 17 | Northumberlnd & Durham | | N & Durham | 1:58.27 |
| 7 | 15 | Yorkshire | | Yorkshire | 2:01.16 |
| 8 | 13 | Derbyshire | | Derbyshire | 2:01.49 |
| 9 | 11 | Kent | | Kent | 2:02.64 |