EVENT 404 Women MC 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 1 | Annabel SHEPHERD | 12 | Deepings | 1:53.34 |
| 2 | 3 | Georgia MIDDLETON | 12 | Louth | 1:49.51 |
| 3 | 5 | Lucy WILLATTS | 11 | Grantham | 1:38.89 |
| 4 | 7 | Sophie FOSTER | 11 | Louth | 1:35.37 |
| 5 | 6 | Amy TAYLOR | 11 | Grantham | 1:35.73 |
| 6 | 4 | Chloe BELLIS | 11 | Deepings | 1:40.01 |
| 7 | 2 | Lottie Ava FLATTERS | 12 | Deepings | 1:49.86 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 9 | Hannah TAYLOR | 10 | Louth | 1:33.21 |
| 2 | 11 | Charlotte JENKINSON | 10 | Deepings | 1:29.91 |
| 3 | 13 | Grace HOWITT | 09 | Grantham | 1:27.25 |
| 4 | 15 | Lexie HAMILTON | 09 | South Lincs | 1:26.07 |
| 5 | 14 | Lucy DAVIS | 09 | Lincoln Vulc | 1:26.64 |
| 6 | 12 | Emily TALKES | 12 | Lincoln Vulc | 1:29.06 |
| 7 | 10 | Ellena HOWITT | 11 | Grantham | 1:30.37 |
| 8 | 8 | Erin ARCHER | 11 | Co Lincoln P | 1:34.56 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 17 | Ella BLACKBOURN | 08 | Lincoln Vulc | 1:24.99 |
| 2 | 19 | Mieke MCDONALD | 10 | Deepings | 1:24.78 |
| 3 | 21 | K GREENWOOD-COVELL | 08 | Deepings | 1:24.39 |
| 4 | 23 | Zara DIXON | 08 | Co Lincoln P | 1:24.10 |
| 5 | 22 | Maisie MATTHEWS | 11 | Louth | 1:24.21 |
| 6 | 20 | Jessica HERRIOTT | 08 | South Lincs | 1:24.52 |
| 7 | 18 | Megan LAMB | 09 | Lincoln Vulc | 1:24.89 |
| 8 | 16 | Elysia SMITH | 10 | Louth | 1:25.72 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 25 | Rianna ABBOTT | 08 | Grantham | 1:23.31 |
| 2 | 27 | Emily BRIGGS | 09 | South Lincs | 1:23.04 |
| 3 | 29 | Harriet MCCORMACK | 09 | Grantham | 1:22.58 |
| 4 | 31 | Amy STRATTON | 05 | Boston | 1:20.91 |
| 5 | 30 | Skye HOLMES | 10 | Louth | 1:22.55 |
| 6 | 28 | Emilija IVANOVA | 09 | Boston | 1:23.01 |
| 7 | 26 | Suzanna BURKE | 11 | Louth | 1:23.26 |
| 8 | 24 | Megan RUTT | 10 | Boston | 1:23.98 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 33 | Emilia THORNLEY-PAYNE | 08 | Boston | 1:20.42 |
| 2 | 35 | Penelope BAXTER | 05 | Deepings | 1:20.23 |
| 3 | 37 | Lucy WILSON | 10 | South Lincs | 1:19.80 |
| 4 | 39 | Florrie HENSMAN | 09 | Louth | 1:19.59 |
| 5 | 38 | Lilli BOWMAN | 07 | South Lincs | 1:19.70 |
| 6 | 36 | Holly GILES | 06 | Louth | 1:19.90 |
| 7 | 34 | Sophie MARSHALL | 05 | Co Lincoln P | 1:20.41 |
| 8 | 32 | Sophie COOKSEY | 10 | Louth | 1:20.82 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 41 | Lillie HAMILTON | 08 | South Lincs | 1:18.41 |
| 2 | 43 | Kitty LAMB | 11 | South Lincs | 1:17.80 |
| 3 | 45 | Helena FIELD | 09 | Louth | 1:17.56 |
| 4 | 47 | Alexandra HALLAM-STOTT | 06 | Grantham | 1:16.93 |
| 5 | 46 | Emmy STINTON | 09 | Co Lincoln P | 1:17.08 |
| 6 | 44 | Grace PECK | 07 | Louth | 1:17.69 |
| 7 | 42 | Emilie WEBB | 10 | Grantham | 1:18.12 |
| 8 | 40 | Madison LAMB | 06 | Lincoln Vulc | 1:19.48 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 49 | Daniela BRINGEMAN | 07 | South Lincs | 1:16.49 |
| 2 | 51 | Wynifred OWEN | 08 | Co Lincoln P | 1:15.08 |
| 3 | 53 | Olivia SPENCER | 06 | Lincoln Vulc | 1:13.90 |
| 4 | 55 | Sophie MORSY | 07 | Boston | 1:13.60 |
| 5 | 54 | Francesca HALLAM-STOTT | 07 | Grantham | 1:13.80 |
| 6 | 52 | Gracie-May COLE | 08 | Co Lincoln P | 1:14.00 |
| 7 | 50 | Charlotte HODGIN | 08 | Co Lincoln P | 1:16.12 |
| 8 | 48 | Hannah BRUCE | 09 | South Lincs | 1:16.50 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 59 | Ruby WARING | 06 | Louth | 1:12.36 |
| 2 | 65 | Evie DICKINSON | 08 | Louth | 1:10.13 |
| 3 | 71 | Megan SPEIRS | 04 | Co Lincoln P | 1:08.90 |
| 4 | 77 | Emma CROKER | 05 | South Lincs | 1:05.70 |
| 5 | 74 | Mollie BRIGGS | 05 | South Lincs | 1:07.90 |
| 6 | 68 | Katie FOUNDS | 06 | Co Lincoln P | 1:09.36 |
| 7 | 62 | Casey CLEAVER | 06 | Co Lincoln P | 1:11.10 |
| 8 | 56 | Corey FARLEY | 09 | Grantham | 1:13.33 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 60 | Samantha MACIJAUSKAITE | 05 | Boston | 1:12.30 |
| 2 | 66 | Alexandra BULAT | 06 | Lincoln Vulc | 1:10.11 |
| 3 | 72 | Evie TURNER | 06 | Grantham | 1:08.65 |
| 4 | 78 | Olivia ANSTEY | 08 | Louth | 1:05.50 |
| 5 | 75 | Grace TURNER | 07 | Grantham | 1:07.26 |
| 6 | 69 | Lilli-Rose CARR | 09 | Co Lincoln P | 1:09.06 |
| 7 | 63 | Tiegan GRAY | 07 | Gainsborough | 1:10.91 |
| 8 | 57 | Erin INGHAM | 08 | Louth | 1:13.14 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 61 | Grace MACDONALD | 09 | Grantham | 1:11.23 |
| 2 | 67 | Jessica O'HERLIHY | 06 | South Lincs | 1:09.60 |
| 3 | 73 | Chloe HOPKINSON | 05 | Grantham | 1:08.59 |
| 4 | 79 | Katie MALONEY | 97 | Lincoln Vulc | 1:04.51 |
| 5 | 76 | Charlotte WRIGHT | 05 | Louth | 1:06.16 |
| 6 | 70 | Mia COPPING | 07 | Lincoln Vulc | 1:09.05 |
| 7 | 64 | Evelyn JACKSON | 08 | Lincoln Vulc | 1:10.22 |
| 8 | 58 | Megan BROWN | 09 | Grantham | 1:12.44 |