EVENT 405 Girls 12 Yrs/Under 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 2 | Isabel Beauchamp | 11 | RichmondDale | 2:10.00 |
| 2 | 4 | Holly Smith | 11 | South Tyne | 2:09.50 |
| 3 | 6 | Ruby Watson | 11 | South Tyne | 1:59.55 |
| 4 | 8 | Sarika Nadkarni | 10 | Tynemouth | 1:50.00 |
| 5 | 7 | Eilidh Jaffray | 11 | B.E.S.T. | 1:57.65 |
| 6 | 5 | Paige Burns | 10 | Barrow | 2:03.78 |
| 7 | 3 | Olivia Fearon | 10 | Copeland | 2:10.00 |
| 8 | 1 | Charlotte Bradford | 10 | RichmondDale | 2:18.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 10 | Emma Blackett | 10 | Gates &Whick | 1:46.70 |
| 1 | 12 | Megan Watson | 10 | Morpeth | 1:45.00 |
| 2 | 14 | Katherine Keogh | 11 | Moors | 1:43.50 |
| 3 | 16 | Rebekah Grange | 12 | Bo Stockton | 1:42.20 |
| 4 | 18 | Madelaine Hardingham | 10 | Co Newcastle | 1:39.50 |
| 5 | 17 | Rosie Sloane | 11 | North Tyne | 1:41.40 |
| 6 | 15 | Erin Rickaby | 12 | South Tyne | 1:43.20 |
| 7 | 13 | Beth Toomey | 12 | Co Newcastle | 1:44.90 |
| 8 | 11 | Ellie Norman | 12 | Gates &Whick | 1:46.00 |
| 9 | 9 | Christa Wilson | 10 | RichmondDale | 1:46.90 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 20 | Niamh Peers | 10 | Copeland | 1:38.10 |
| 1 | 22 | Caitlin Chadwick | 12 | Tynemouth | 1:36.10 |
| 2 | 24 | Ellie James | 12 | South Tyne | 1:34.20 |
| 3 | 26 | Faye Rogers | 10 | Bo Stockton | 1:33.10 |
| 4 | 28 | Milli Steele | 10 | Bo Stockton | 1:32.00 |
| 5 | 27 | Nicole Walker | 12 | Billingham | 1:32.60 |
| 6 | 25 | Annabel McCrory | 10 | Derwentside | 1:33.80 |
| 7 | 23 | Catherine Arrol | 11 | Bo Stockton | 1:35.80 |
| 8 | 21 | Lucy Bulmer | 10 | Co Newcastle | 1:38.00 |
| 9 | 19 | Marissa O'Rourke | 11 | Co Newcastle | 1:38.60 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 30 | Neve Mason | 11 | Wear Valley | 1:29.80 |
| 1 | 32 | Amy Malone | 11 | StirlingSwim | 1:28.30 |
| 2 | 34 | Nicola Layfield | 10 | Derwentside | 1:26.46 |
| 3 | 36 | Kimiko Cheng | 11 | Co Newcastle | 1:25.50 |
| 4 | 38 | Lauren Cooley | 12 | Cockermouth | 1:24.80 |
| 5 | 37 | Erin Donnelly | 10 | Bo Stockton | 1:25.04 |
| 6 | 35 | Alisha Ballantine | 12 | Co Sund'land | 1:26.00 |
| 7 | 33 | Hayley Rankin | 10 | Derwentside | 1:27.00 |
| 8 | 31 | Samantha Clark | 11 | Carlisle Aq | 1:28.80 |
| 9 | 29 | Hannah Daglish | 11 | Gates &Whick | 1:30.10 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 40 | Catherine Soeder | 12 | B.E.S.T. | 1:24.36 |
| 1 | 42 | Rebecca Dobbins | 11 | Co Newcastle | 1:24.10 |
| 2 | 44 | Natalya Sharp | 12 | Co Sund'land | 1:22.20 |
| 3 | 46 | Elizabeth Airey | 12 | Carlisle Aq | 1:20.00 |
| 4 | 48 | Holly Rowlinson | 12 | SwimTrafford | 1:16.65 |
| 5 | 47 | Anna Livermore | 12 | SwimTrafford | 1:19.30 |
| 6 | 45 | Freya Williams | 12 | Billingham | 1:20.60 |
| 7 | 43 | Emma Wilson | 11 | Derwentside | 1:23.40 |
| 8 | 41 | Amy Dixon | 12 | Co Sund'land | 1:24.10 |
| 9 | 39 | Hannah Seymour | 11 | Morpeth | 1:24.54 |