EVENT 129 Boys 12/13 Yrs 4x50m Medley Team - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | A.G. | Club/Country | Time |
| 0 | 2 | Swim Wales West | | Swim Wales W | |
| 1 | 4 | Swim Wales East | | Swim Wales E | 2:06.00 |
| 2 | 6 | Sussex | | Sussex | 2:03.21 |
| 3 | 8 | Hampshire | | Hampshire | 2:03.15 |
| 4 | 10 | Cheshire | | Cheshire | 2:01.94 |
| 5 | 9 | Oxford & North Bucks | | Ox & N Bucks | 2:03.15 |
| 6 | 7 | Surrey | | Surrey | 2:03.20 |
| 7 | 5 | Nottinghamshire | | Notts | 2:03.32 |
| 8 | 3 | Northumberlnd & Durham | | N & Durham | 2:09.82 |
| 9 | 1 | Scotland East | | Scot East | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | A.G. | Club/Country | Time |
| 0 | 12 | Lancashire | | Lancashire | 2:01.55 |
| 1 | 14 | Worcester | | Worcs | 2:01.46 |
| 2 | 16 | Berkshire & S Bucks | | Berks&SBucks | 2:01.01 |
| 3 | 18 | Somerset | | Somerset | 2:00.66 |
| 4 | 20 | Hertfordshire | | Herts | 1:59.35 |
| 5 | 19 | Yorkshire | | Yorkshire | 1:59.88 |
| 6 | 17 | Kent | | Kent | 2:00.80 |
| 7 | 15 | Derbyshire | | Derbyshire | 2:01.16 |
| 8 | 13 | Middlesex | | Middlesex | 2:01.53 |
| 9 | 11 | Scotland West | | Scot West | 2:01.92 |