EVENT 119 Boys 12/13 Yrs 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 2 | Brandon Budd-Thomas | 00 | Swim Wales W | 1:10.42 |
| 1 | 4 | Harvey Tait | 00 | Scot East | 1:09.90 |
| 2 | 6 | Nick Law | 99 | Cheshire | 1:09.00 |
| 3 | 8 | Ryan Retson | 00 | Scot West | 1:08.57 |
| 4 | 10 | Myles Stirk | 00 | Yorkshire | 1:07.60 |
| 5 | 9 | Henry Rennolls | 00 | Kent | 1:08.20 |
| 6 | 7 | Nathan Corrigan | 00 | Hampshire | 1:08.77 |
| 7 | 5 | Joseph Martin | 00 | N & Durham | 1:09.90 |
| 8 | 3 | Louis Wood | 00 | Sussex | 1:10.23 |
| 9 | 1 | Rhys James | 00 | Swim Wales E | 1:10.80 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 12 | Harry Middleton | 00 | Berks&SBucks | 1:07.10 |
| 1 | 14 | Lucas Dyson-Diaz | 00 | Middlesex | 1:06.70 |
| 2 | 16 | Matthew George | 00 | Lancashire | 1:05.10 |
| 3 | 18 | Elliot Clogg | 99 | Notts | 1:04.85 |
| 4 | 20 | Oliver Manser | 99 | Somerset | 1:02.80 |
| 5 | 19 | Hugo Lemar | 99 | Worcs | 1:04.32 |
| 6 | 17 | Max Jameson | 00 | Surrey | 1:05.10 |
| 7 | 15 | Nathan Hughes | 00 | Herts | 1:05.98 |
| 8 | 13 | Joseph Walker | 99 | Ox & N Bucks | 1:07.10 |
| 9 | 11 | Rhys Llewellyn | 00 | Derbyshire | 1:07.25 |