EVENT 504 Open/Male 10 /Over 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Lewis Ashbridge | 11 | Melton M'bry | 1:37.71 |
| 3 | 4 | Oscar Cookson | 11 | Bassetlaw SS | 1:35.14 |
| 4 | 6 | Henry Richards | 11 | Northampton | 1:32.50 |
| 5 | 5 | Finnley Stevenson | 11 | Loughborough | 1:33.89 |
| 6 | 3 | Joel Gardner | 11 | Loughborough | 1:37.05 |
| 7 | 1 | Hugo Brailsford | 11 | Deepings | 1:38.92 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Toby Wilson | 12 | Melton M'bry | 1:28.97 |
| 2 | 10 | Ashton Anderson | 11 | Northampton | 1:25.20 |
| 3 | 12 | Joseph Bird | 12 | Northampton | 1:24.30 |
| 4 | 14 | James Oscroft | 12 | Northampton | 1:21.60 |
| 5 | 13 | Albert Haile | 13 | Louth | 1:23.18 |
| 6 | 11 | Thomas Vere | 11 | South Lincs | 1:24.47 |
| 7 | 9 | Jacob Quennell | 12 | Northampton | 1:25.70 |
| 8 | 7 | Jarvis Crawley | 11 | Chesterfield | 1:30.95 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Oliver Doran | 12 | Co Leicester | 1:20.37 |
| 2 | 18 | Daniil Obuhov | 12 | Co Leicester | 1:19.86 |
| 3 | 20 | Louis Pell | 14 | Northampton | 1:18.10 |
| 4 | 22 | Kevin Varga | 12 | Co Leicester | 1:16.28 |
| 5 | 21 | Daniel Tomozei | 14 | Chesterfield | 1:16.48 |
| 6 | 19 | Lucas Poole | 13 | Northampton | 1:19.00 |
| 7 | 17 | Alfie Grounsell | 12 | Bassetlaw SS | 1:20.11 |
| 8 | 15 | Reid Hutchins | 11 | Bassetlaw SS | 1:21.50 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Jude Bouch | 14 | Melton M'bry | 1:14.80 |
| 2 | 26 | Oscar O'Donnell | 13 | Co Leeds | 1:13.50 |
| 3 | 28 | Seth Gillies | 14 | Northampton | 1:12.98 |
| 4 | 30 | Peter Nightingale | 15 | Co Leicester | 1:10.48 |
| 5 | 29 | Edward Oscroft | 16 | Northampton | 1:11.66 |
| 6 | 27 | Olly Lockton | 16 | Loughborough | 1:13.09 |
| 7 | 25 | Oscar Venn | 13 | Northampton | 1:14.18 |
| 8 | 23 | Jack Robertson | 13 | Flitwick | 1:15.82 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 32 | Jacob O'Donnell | 15 | Co Leeds | 1:07.70 |
| 2 | 34 | George Howard | 13 | Co Leicester | 1:07.40 |
| 3 | 36 | Oscar Sherwani | 17 | Flitwick | 1:06.42 |
| 4 | 38 | Emerson-Blu Gupwell | 15 | Co Leicester | 1:05.82 |
| 5 | 37 | Riley Woodward | 16 | Northampton | 1:06.20 |
| 6 | 35 | Lucas Moxon-Booth | 16 | Flitwick | 1:06.70 |
| 7 | 33 | Charlie Bisby | 14 | South Lincs | 1:07.65 |
| 8 | 31 | Lochlan Shaw | 15 | Flitwick | 1:07.74 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 40 | William Lancashire | 15 | Co Leeds | 1:05.35 |
| 2 | 42 | Gabriel Corbett | 15 | Co Leicester | 1:04.42 |
| 3 | 44 | Hayden Lam | 15 | Co Leeds | 1:02.45 |
| 4 | 46 | James Thomson | 16 | Co Leeds | 1:02.07 |
| 5 | 45 | C Butterell-Quanbrough | 15 | Bassetlaw SS | 1:02.19 |
| 6 | 43 | William Campbell | 17 | Loughborough | 1:03.71 |
| 7 | 41 | Oliver Smith | 16 | Radford | 1:04.56 |
| 8 | 39 | Finley Fowler | 15 | Coalville | 1:05.54 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 48 | Layton Annison-Snowden | 16 | Louth | 1:01.46 |
| 2 | 50 | Harry Lucas | 15 | Co Leicester | 1:01.04 |
| 3 | 52 | Christopher Emberlin | 18 | Lboro Uni | 59.23 |
| 4 | 54 | Benjamin Hatfield | 19 | Lboro Uni | 55.35 |
| 5 | 53 | Harrison Shaw | 18 | Flitwick | 58.59 |
| 6 | 51 | Jack Hurry | 16 | Northampton | 1:00.00 |
| 7 | 49 | Edun Rowe | 17 | Northampton | 1:01.10 |
| 8 | 47 | Jack Smith | 15 | Co Leicester | 1:01.63 |