EVENT 411 Mens Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Harrison Barber | 13 | Biddulph | 4:31.19 |
| 4 | 3 | Joseph Deighan | 13 | Stockport Mo | 4:30.97 |
| 5 | 2 | Thomas Watkin | 14 | Royal Wolv | 4:31.19 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 4 | Luke Skelding | 14 | Co Birm'ham | 4:30.91 |
| 1 | 6 | Ayotobi Laguda | 14 | Hatfield | 4:30.13 |
| 2 | 8 | Ryan Wilcox | 14 | Nova Cent'n | 4:29.98 |
| 3 | 10 | Henry Pearce | 14 | Co Peterboro | 4:29.55 |
| 4 | 12 | Oliver Watson | 14 | Co Birm'ham | 4:28.68 |
| 5 | 11 | Kieran Dale | 14 | Thanet Swim | 4:28.74 |
| 6 | 9 | Kieran Summers | 13 | Scunthorpe A | 4:29.81 |
| 7 | 7 | Samuel Salih | 14 | Co Sheffield | 4:30.10 |
| 8 | 5 | Ellis Stanhope | 14 | Sevenoaks | 4:30.16 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 14 | Lewis Moore | 14 | Deben | 4:28.17 |
| 1 | 16 | Oliver Duckworth | 14 | Grimsby AST | 4:27.64 |
| 2 | 18 | Daniel Johnson | 14 | Royal Wolv | 4:27.56 |
| 3 | 20 | Ben Cope | 15 | Royal Wolv | 4:25.93 |
| 4 | 22 | Lewis Collins | 15 | KingstonHull | 4:25.11 |
| 5 | 21 | Thomas Wilton | 15 | Co Cant'bury | 4:25.42 |
| 6 | 19 | Rupert Hague | 15 | Millfield | 4:25.97 |
| 7 | 17 | James Newman | 14 | Co Leicester | 4:27.63 |
| 8 | 15 | Benjamin Foster | 14 | Stockport Mo | 4:28.10 |
| 9 | 13 | Lewis Binning | 13 | Romford Town | 4:28.63 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 24 | Adam Hall | 15 | Gloucester | 4:24.08 |
| 1 | 26 | Charlie Palmer | 15 | Derventio | 4:22.74 |
| 2 | 28 | William Chapman | 15 | Barnet Copt | 4:22.04 |
| 3 | 30 | Billy Harrison | 15 | Romford Town | 4:21.36 |
| 4 | 32 | Paolo Moniz | 16 | Southport | 4:20.23 |
| 5 | 31 | Joshua Harris | 15 | Nova Cent'n | 4:20.82 |
| 6 | 29 | Joel Lange | 15 | Maidenhead | 4:21.42 |
| 7 | 27 | William Graham | 15 | Melton M'bry | 4:22.26 |
| 8 | 25 | Harvey Norman | 15 | Co Peterboro | 4:22.98 |
| 9 | 23 | Oliver Smith | 15 | Durham City | 4:24.66 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 34 | Simon Kliment | 15 | Donc Dartes | 4:19.87 |
| 1 | 36 | Reece Nicholls | 16 | Basildon Ph | 4:19.48 |
| 2 | 38 | Alexander Axford | 16 | Co Manch Aq | 4:18.92 |
| 3 | 40 | Samuel Pereira | 16 | Enfield Sq | 4:18.71 |
| 4 | 42 | Max Wilson | 16 | Modernian | 4:17.92 |
| 5 | 41 | Thomas Owens | 17 | Barnes SC | 4:18.09 |
| 6 | 39 | Joshua Lewis | 16 | Thanet Swim | 4:18.91 |
| 7 | 37 | William Davies | 16 | Swindon Dolp | 4:18.94 |
| 8 | 35 | James Woodward | 16 | Potters Bar | 4:19.57 |
| 9 | 33 | Thomas Brew | 16 | Mt Kelly | 4:20.03 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 44 | Joseph Dobb | 16 | Bromley | 4:17.31 |
| 1 | 46 | Myles Turner | 16 | West Suffolk | 4:16.22 |
| 2 | 48 | Kane Murcott | 16 | Royal Wolv | 4:15.91 |
| 3 | 50 | Luke Elliott | 17 | South Lincs | 4:15.84 |
| 4 | 52 | Declan Hall | 17 | Wigan BEST | 4:14.94 |
| 5 | 51 | James Wilks | 17 | Leatherhead | 4:15.14 |
| 6 | 49 | James Morrison | 17 | Bolton Metro | 4:15.89 |
| 7 | 47 | Marcus Johnson | 17 | Co Milton K | 4:16.01 |
| 8 | 45 | Harry Bamforth | 16 | Ellesmere Co | 4:16.87 |
| 9 | 43 | Bayley Finbow | 16 | teamipswich | 4:17.45 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 55 | Cadan Mc Carthy | 16 | Munster IRL | 4:13.65 |
| 1 | 59 | Ryan Reader | 18 | Co Derby | 4:12.19 |
| 2 | 63 | Maxwell Dalziel | 19 | Ellesmere Co | 4:11.30 |
| 3 | 67 | Casey Barrett | 17 | Royal Wolv | 4:08.61 |
| 4 | 71 | Joel Allen | 19 | Co Leicester | 4:06.27 |
| 5 | 69 | Alexander Bregazzi | 18 | Io Man | 4:08.34 |
| 6 | 65 | Dominic Wooldridge | 21 | Exeter City | 4:10.20 |
| 7 | 61 | Liam Snook | 18 | Northampton | 4:12.03 |
| 8 | 57 | Bailey Hairsine | 17 | KingstonHull | 4:13.02 |
| 9 | 53 | Jacques Bonsell | 17 | Blackpool Aq | 4:14.65 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 56 | Edward Lee | 17 | Woking | 4:13.64 |
| 1 | 60 | Max McCusker | 17 | Millfield | 4:12.11 |
| 2 | 64 | Hugo Bellamy | 18 | Amersham | 4:11.09 |
| 3 | 68 | Craig Munden | 19 | Loughboro Un | 4:08.57 |
| 4 | 72 | Joe Evans | 23 | Co Coventry | 4:05.85 |
| 5 | 70 | Jack Baister | 19 | Loughboro Un | 4:07.76 |
| 6 | 66 | Charlie Waddingham | 18 | Co Coventry | 4:09.32 |
| 7 | 62 | Rory Huggins | 17 | Havant & Wat | 4:11.98 |
| 8 | 58 | Steven Wilson | 19 | Birm'ham Uni | 4:12.76 |
| 9 | 54 | Samuel Crabtree | 17 | Thanet Swim | 4:14.22 |