EVENT 14 Open/Male 200m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Laurence DE ROSE | 9 | Deepings | 5:15.00 |
| 4 | 2 | Jack SMITH | 10 | Gainsborough | 4:25.00 |
| 5 | 3 | Edward BIRINY | 11 | Lincoln Vulc | 4:25.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Rory MACKFALL | 12 | Lincoln Vulc | 4:09.50 |
| 2 | 5 | Felix THORNDIKE | 9 | Lincoln Vulc | 4:07.76 |
| 3 | 6 | Teddy LAWLOR | 11 | Louth | 4:07.67 |
| 4 | 7 | Ethan PEART | 10 | Deepings | 4:06.83 |
| 5 | 8 | Oliver ERSKINE | 13 | Lincoln TSA | 4:04.88 |
| 6 | 9 | William PENNOCK | 12 | Grantham | 3:54.96 |
| 7 | 10 | Jack PAIGE | 11 | Deepings | 3:50.00 |
| 8 | 11 | Liam EDMEADES | 10 | Deepings | 3:50.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Daniel GODDARD | 11 | Grantham | 3:48.60 |
| 2 | 13 | Tom BARRATT | 11 | Gainsborough | 3:44.54 |
| 3 | 14 | Damir IVANOVS | 11 | Boston | 3:37.51 |
| 4 | 15 | Derrin BROCKLEBANK | 12 | Grantham | 3:34.37 |
| 5 | 16 | Benjamin SHEARN | 12 | Grantham | 3:30.06 |
| 6 | 17 | Bertie ROSE | 12 | Lincoln Vulc | 3:20.57 |
| 7 | 18 | Ethan COUGHLAN | 14 | Lincoln Vulc | 3:19.90 |
| 8 | 19 | Benjamin GODDARD | 13 | Grantham | 3:19.46 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 21 | Louis WRIGHT | 12 | Grantham | 3:10.61 |
| 2 | 23 | Samuel GRIFFIN | 13 | Deepings | 3:03.73 |
| 3 | 25 | Ethan HUNTER | 15 | Lincoln Vulc | 2:42.70 |
| 4 | 27 | James THOMAS | 16 | Gainsborough | 2:33.70 |
| 5 | 26 | Archie FRENCH | 16 | Lincoln Vulc | 2:40.28 |
| 6 | 24 | Oscar HE | 13 | Gainsborough | 3:00.71 |
| 7 | 22 | Dominic MCLAUGHLIN | 15 | Louth | 3:08.74 |
| 8 | 20 | Brody LENTZ | 11 | Louth | 3:16.61 |