EVENT 208 Open/Male 09/Over 100m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Damir IVANOVS | 9 | Boston | 2:00.00 |
| 2 | 4 | Albie EDGLEY | 9 | Skegness | 1:49.99 |
| 3 | 6 | Gregory CROSS | 10 | Melton M'bry | 1:45.04 |
| 4 | 8 | Theo VANDOROS | 11 | Melton M'bry | 1:40.90 |
| 5 | 7 | Thomas KINNEAR | 12 | Grantham | 1:42.37 |
| 6 | 5 | Charlie VENABLES | 11 | March | 1:46.25 |
| 7 | 3 | Thomas WHITTLE | 12 | Grantham | 1:50.00 |
| 8 | 1 | Benjamin SHEARN | 10 | Grantham | 2:07.02 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Owen ZHANG | 12 | Gainsborough | 1:40.00 |
| 2 | 12 | Noah REDWOOD-MOORE | 11 | Melton M'bry | 1:39.45 |
| 3 | 14 | Joseph WRIGHT | 10 | Gainsborough | 1:38.75 |
| 4 | 16 | Markas PARAPIJONAVICIU | 10 | Grantham | 1:36.48 |
| 5 | 15 | Dylan MACKIE | 12 | March | 1:37.49 |
| 6 | 13 | Oscar HE | 11 | Gainsborough | 1:39.24 |
| 7 | 11 | Tom BARRATT | 9 | Gainsborough | 1:40.00 |
| 8 | 9 | Alex NEVARD | 12 | Grantham | 1:40.85 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Derrin BROCKLEBANK | 10 | Grantham | 1:34.74 |
| 2 | 20 | Parker PIDHORODECKYJ | 10 | Newark | 1:30.00 |
| 3 | 22 | Jayden GOWLING | 12 | Skegness | 1:29.06 |
| 4 | 24 | Matt HALL | 13 | March | 1:27.35 |
| 5 | 23 | Isaac FAHEY | 11 | Newark | 1:28.03 |
| 6 | 21 | Freddie HIRST | 9 | Grantham | 1:29.56 |
| 7 | 19 | James FORGIONE | 10 | Newark | 1:33.90 |
| 8 | 17 | Sasha ROMANOVSKIJ | 9 | Newark | 1:35.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Zachary LAWRENCE | 11 | Louth | 1:26.62 |
| 2 | 28 | Leo BARNETT | 12 | Grantham | 1:25.19 |
| 3 | 30 | GEORGE WOODHEAD | 11 | Gainsborough | 1:22.60 |
| 4 | 32 | Eugene CHEUNG | 12 | Grantham | 1:21.60 |
| 5 | 31 | Toby EDMONDSON | 9 | Grantham | 1:21.97 |
| 6 | 29 | George LEONARD | 11 | Grantham | 1:23.50 |
| 7 | 27 | Oliver TEE | 14 | Melton M'bry | 1:26.28 |
| 8 | 25 | Henry DOLAN | 10 | Grantham | 1:27.33 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Alfie HAIGH | 15 | Grantham | 1:18.89 |
| 2 | 36 | Freddie PRICE | 12 | Louth | 1:16.86 |
| 3 | 38 | Clayton CHRISTENSEN | 13 | Melton M'bry | 1:16.17 |
| 4 | 40 | Joel SADLER | 13 | Grantham | 1:14.45 |
| 5 | 39 | Max PRIMMER | 13 | March | 1:14.51 |
| 6 | 37 | Albert HAILE | 12 | Louth | 1:16.62 |
| 7 | 35 | Thomas HILLSON | 11 | Grantham | 1:17.50 |
| 8 | 33 | Elliot GLEAVE | 11 | Grantham | 1:20.80 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 42 | Mason RILEY | 13 | March | 1:11.90 |
| 2 | 44 | Jakob NELSON | 14 | Newark | 1:10.55 |
| 3 | 46 | Benjamin MORRIS | 14 | Boston | 1:08.93 |
| 4 | 48 | Ben CARLYLE | 14 | Grantham | 1:06.70 |
| 5 | 47 | Alfie BLADES | 13 | Gainsborough | 1:07.65 |
| 6 | 45 | Ant HALL | 15 | March | 1:09.53 |
| 7 | 43 | Loui MAYNE | 13 | Melton M'bry | 1:11.09 |
| 8 | 41 | Daniel PEARSON | 35 | Boston | 1:13.71 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 50 | Benjamin MASON | 18 | Newark | 1:02.50 |
| 2 | 52 | James DRENNAN | 15 | Melton M'bry | 1:01.31 |
| 3 | 55 | Adam FOUND | 27 | Grantham | 58.88 |
| 4 | 58 | Ryan NORTON | 16 | Boston | 56.27 |
| 5 | 57 | Owen HATHWAY | 17 | Grantham | 56.68 |
| 6 | 54 | Zach HOPKINSON | 15 | Grantham | 59.43 |
| 7 | 51 | Leo GARRISON | 17 | Gainsborough | 1:02.30 |
| 8 | 49 | James THOMAS | 14 | Gainsborough | 1:06.62 |