EVENT 234 Men 16 Yrs/Over 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 3 | 1 | Kian Saville | 23 | SB9 | Daventry | 1:41.32 |
| 4 | 3 | Jeremiah Muir | 16 | | Kettering | 1:31.76 |
| 5 | 2 | Bruce Dee | 17 | SB6 | Northampton | 1:41.16 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 7 | James Plenderleith | 16 | | Corby | 1:23.10 |
| 2 | 13 | Elliott Barker | 16 | | Northampton | 1:19.43 |
| 3 | 19 | Jack Kentish | 16 | | Daventry | 1:15.83 |
| 4 | 25 | Aaron Flynn | 33 | | Wellingboro | 1:06.62 |
| 5 | 22 | Thomas Stevens | 23 | | Daventry | 1:10.28 |
| 6 | 16 | Benjamin Bayes | 19 | | Wellingboro | 1:19.08 |
| 7 | 10 | Curtis Minney | 18 | | Kettering | 1:20.64 |
| 8 | 4 | Conner Munden | 16 | | Northampton | 1:27.70 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 8 | Benjamin Gibbons | 16 | | Northampton | 1:21.40 |
| 2 | 14 | Toby Dew | 19 | | Nene Valley | 1:19.36 |
| 3 | 20 | Cameron Bell | 16 | | Rushden | 1:14.45 |
| 4 | 26 | Ross Balderson | 23 | | Rushden | 1:06.20 |
| 5 | 23 | Max Balderson | 20 | | Rushden | 1:08.80 |
| 6 | 17 | Alexander Menshutkin | 16 | | Kettering | 1:18.75 |
| 7 | 11 | Louis Booker | 16 | | Wellingboro | 1:20.62 |
| 8 | 5 | Freddy Keech | 16 | | Kettering | 1:26.97 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 9 | Filip Kanikowski | 20 | | Kettering | 1:21.36 |
| 2 | 15 | Thomas James | 17 | | Wellingboro | 1:19.32 |
| 3 | 21 | Manav Mistry | 16 | | Northampton | 1:13.50 |
| 4 | 27 | Samuel Smith | 18 | | Northampton | 1:03.18 |
| 5 | 24 | Adam Frazer | 17 | | Rushden | 1:08.21 |
| 6 | 18 | Noah Wrightson | 19 | | Wellingboro | 1:17.35 |
| 7 | 12 | Harris Chacksfield | 18 | | Kettering | 1:19.45 |
| 8 | 6 | Joseph Greaves | 16 | | Corby | 1:25.06 |