EVENT 103 Mixed 800m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 1 | Emmie-Rose POWER | 13 | Hinckley | |
| 2 | 3 | Oliver DORAN | 13 | Leic Peng | |
| 3 | 5 | Harry STATHAM-GILL | 13 | Coalville | |
| 4 | 7 | Ellie POULTON-BURBANK | 11 | Loughborough | |
| 5 | 6 | Jessica CURRIE | 12 | Coalville | |
| 6 | 4 | Ollie PERRINS | 12 | Loughborough | |
| 7 | 2 | Rahul REEDHA | 13 | Braunstone | |
| 8 | 40 | Luke MORAN | 12 | Coalville | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 9 | Niamh SHEARN | 11 | Market Har | |
| 2 | 11 | Isabella DERBYSHIRE | 13 | Leic Sharks | |
| 3 | 13 | Evie BRAMFORD | 11 | Hinckley | |
| 4 | 15 | Ivy LOWE | 12 | Leicester Ne | |
| 5 | 14 | Amelia BELCHER | 11 | Coalville | |
| 6 | 12 | Logan MAGGS | 12 | Hinckley | |
| 7 | 10 | Daniil OBUHOV | 13 | Braunstone | |
| 8 | 8 | Ellie CLARKE | 11 | Hinckley | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 17 | Chloe MORLEY | 12 | Coalville | |
| 2 | 19 | Katherine FLETCHER | 13 | Loughborough | |
| 3 | 21 | Georgia DAVIES | 11 | Hinckley | |
| 4 | 23 | Emilia DURRINGTON | 10 | Braunstone | |
| 5 | 22 | India SAWYER | 12 | Coalville | |
| 6 | 20 | Michaela RICHARDSON | 10 | Hinckley | |
| 7 | 16 | Peter NIGHTINGALE | 10 | Coalville | |
| 8 | 18 | Jessica PURSER | 11 | Braunstone | |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 25 | Joshua HARVEY | 10 | Loughborough | |
| 2 | 27 | Aimee FRASER | 09 | Hinckley | |
| 3 | 29 | Freya WINGFIELD-DOBBS | 06 | Leicester Ne | |
| 4 | 31 | Oliver GOODWIN | 10 | Coalville | |
| 5 | 30 | John GRAHAM-BROWN | 12 | Leic Peng | |
| 6 | 28 | Sophie WRIGHT | 09 | Hinckley | |
| 7 | 26 | Michael FRASER | 11 | Hinckley | |
| 8 | 24 | Jessica GREENHALGH | 11 | Leicester Ne | |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 33 | Samuel HICKS | 11 | Hinckley | |
| 2 | 35 | Nicholas LUNN | 12 | Coalville | |
| 3 | 37 | Isabelle WALCZAK | 08 | Leic Peng | |
| 4 | 39 | Erika CLARKE | 11 | Leic Peng | |
| 5 | 38 | Milen MERRITT | 12 | Melton M'bry | |
| 6 | 36 | Marta UCIECHA | 10 | Leicester Ne | |
| 7 | 34 | Peta MORLEY | 11 | Hinckley | |
| 8 | 32 | Myla DIZON | 11 | Braunstone | |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 41 | George COLEMAN | 10 | Coalville | |
| 2 | 43 | Ava HARVEY | 09 | Leic Sharks | |
| 3 | 45 | Andrei OBUHOV | 11 | Braunstone | |
| 4 | 47 | Sophia TSINONTAS | 10 | Leic Sharks | |
| 5 | 46 | Theo BLACK | 10 | Leic Sharks | |
| 6 | 44 | Jessica ATKINS | 07 | Leic Peng | |
| 7 | 42 | Eleanor TRAHEARN | 09 | Hinckley | |
| 8 | 48 | Megan BLAIR | 11 | Coalville | |
| Heat Number - 7 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 51 | Abigail GOLYNKER | 10 | Leic Sharks | |
| 2 | 53 | Seth GARDNER | 11 | Loughborough | |
| 3 | 55 | Hollie COWLES | 11 | Braunstone | |
| 4 | 54 | Eloise ALLSAGER | 07 | Leic Peng | |
| 5 | 57 | William BURDOCK | 09 | Melton M'bry | |
| 6 | 52 | Frank BACON | 10 | Braunstone | |
| 7 | 50 | Ryan HEJRATY | 10 | Leicester Ne | : . |
| 8 | 59 | Bethany HENSON | 10 | Coalville | |
| Heat Number - 8 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 61 | Emma GRAHAM-BROWN | 09 | Leic Peng | |
| 2 | 63 | Oliver LOND | 08 | Hinckley | |
| 3 | 62 | Ava STEANS | 10 | Hinckley | |
| 4 | 64 | Florence SENIOR | 10 | Braunstone | |
| 5 | 60 | Nicola MICHALSKA | 11 | Leic Sharks | |
| 6 | 58 | Lily BARKER | 03 | Leic Sharks | |
| 7 | 66 | William KING | 08 | Hinckley | |
| 8 | 67 | Ryan HALES | 08 | Hinckley | |
| Heat Number - 9 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 69 | Francesca PALFREY | 06 | Loughborough | |
| 2 | 71 | James GOODWIN | 05 | OadbyWigston | |
| 3 | 70 | James HOCKEY | 09 | Coalville | |
| 4 | 72 | Sarah DEW | 07 | Leic Sharks | |
| 5 | 68 | Anna CLARKE | 09 | Leic Peng | |
| 6 | 75 | Maxwell BURDETT | 12 | Leic Peng | |
| 7 | 77 | Holly GENT | 11 | Coalville | |
| 8 | 78 | Chiara REEDHA | 09 | Braunstone | |
| Heat Number - 10 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 74 | Matilda MCGRATH | 07 | Braunstone | |
| 2 | 81 | Freddie BURDETT | 10 | Leic Peng | |
| 3 | 83 | Jacson CRABB | 11 | Leic Sharks | |
| 4 | 85 | William OXLEY | 10 | Braunstone | |
| 5 | 87 | Daniel HARRIS | 07 | Coalville | |
| 6 | 84 | Oliver DAVIES | 09 | Leic Peng | |
| 7 | 82 | Francesca HARRISON | 09 | Braunstone | |
| 8 | 80 | Janie FINCH | 10 | Hinckley | |
| Heat Number - 11 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 86 | Jack SMITH | 10 | Leic Sharks | |
| 2 | 56 | Victor BRAMLEY-HOWELL | 10 | Leic Peng | |
| 4 | 65 | Philippa BODEY | 11 | Leicester Ne | |
| 5 | 73 | Andrew BLAIR | 11 | Leicester Ne | |
| 6 | 79 | Jessica LINES | 09 | Leic Sharks | |
| 7 | 76 | Harrison BYWATER | 07 | Loughborough | |
| 8 | 49 | Sofia REEDHA | 11 | Braunstone | |