EVENT 404 Mens MC 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 3 | 1 | Zach Washington-Young | 90 | S6 | Co Liverpool | 7:54.00 |
| 4 | 3 | Fabian Brune | 00 | S7 | Germany | 7:00.39 |
| 5 | 2 | Benjamin Rees | 97 | S6 | Nova Cent'n | 7:34.71 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 1 | 5 | Finlay Middleton | 02 | S8 | Mt Kelly | 6:27.11 |
| 2 | 7 | William Hardy | 98 | S6 | Gates &Whick | 6:19.62 |
| 3 | 9 | Alexander Taylor | 01 | S10 | Harrogate | 6:16.03 |
| 4 | 11 | Simon Prodanovic | 00 | S7 | Germany | 6:09.26 |
| 5 | 10 | Matthew Harding | 99 | S6 | Wirral Metro | 6:15.77 |
| 6 | 8 | Leo Johnson | 93 | S8 | Chelsea&West | 6:17.02 |
| 7 | 6 | Luke Batty | 05 | S9 | Bolton Metro | 6:21.84 |
| 8 | 4 | Nils Rehm | 01 | S9 | Bristol Nor | 6:40.94 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 13 | Dominic Redpath | 02 | S9 | Gosport | 6:03.69 |
| 1 | 15 | Joshua Fruin | 02 | S10 | Portsmouth N | 5:59.15 |
| 2 | 17 | Scott Hadley | 98 | S8 | Orion | 5:50.42 |
| 3 | 19 | Matthew Clowes | 99 | S8 | Caradon | 5:44.59 |
| 4 | 21 | Reilly Shanahan | 00 | S9 | Shrewsbury | 5:38.21 |
| 5 | 20 | Benjamin Grainger | 03 | S10 | Io Man | 5:39.10 |
| 6 | 18 | Adam Donnachie | 00 | S8 | Blantyre | 5:49.40 |
| 7 | 16 | Connor Lockwood | 03 | S14 | Woking | 5:56.07 |
| 8 | 14 | James Brown | 02 | S9 | Orion | 6:00.36 |
| 9 | 12 | Connor Boyfield | 98 | S9 | Boston | 6:05.34 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 25 | Matthew Rishworth | 02 | S10 | Staines | 5:26.60 |
| 1 | 31 | Thomas Brown | 99 | S14 | Burnley BOBC | 5:00.53 |
| 2 | 37 | Michael Jones | 94 | S7 | Mt Kelly | 4:51.53 |
| 3 | 43 | Benjamin Foulston | 00 | S10 | Nova Cent'n | 4:34.18 |
| 4 | 49 | Oliver Hynd | 94 | S8 | Nova Cent'n | 4:24.32 |
| 5 | 46 | Lewis White | 00 | S9 | Co Derby | 4:29.33 |
| 6 | 40 | Kevin Casali | 93 | S14 | Italy | 4:37.87 |
| 7 | 34 | Liam Spence | 00 | S14 | KingstonHull | 4:57.42 |
| 8 | 28 | Ellis Underwood | 00 | S13 | Co Newport | 5:08.54 |
| 9 | 22 | Matthis Daniel | 98 | S14 | France | 5:30.50 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 26 | Christian Buchanan | 01 | S14 | East Lothian | 5:25.92 |
| 1 | 32 | Matthew Redfern | 98 | S13 | Worcester | 5:00.11 |
| 2 | 38 | Jamie Warriner | 99 | S10 | Preston | 4:45.19 |
| 3 | 44 | Josef Craig | 97 | S8 | Co Sund'land | 4:34.00 |
| 4 | 50 | Stephen Clegg | 95 | S12 | East Lothian | 4:23.58 |
| 5 | 47 | Jonathan Booth | 98 | S9 | Bo Kirklees | 4:29.12 |
| 6 | 41 | Jaxon Simmons | 00 | S13 | Co Peterboro | 4:35.62 |
| 7 | 35 | Luke Reeson | 87 | S10 | Cockermouth | 4:55.79 |
| 8 | 29 | Arthur Morley | 99 | S9 | Winchester | 5:05.62 |
| 9 | 23 | Andreas Onea | 92 | S8 | Austria | 5:30.50 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Cat | Club/Country | Time |
| 0 | 27 | Cameron Vearncombe | 02 | S14 | Caradon | 5:23.62 |
| 1 | 33 | Tom Piggott | 00 | S10 | Shrewsbury | 4:58.01 |
| 2 | 39 | Oliver Carter | 00 | S10 | Carnegie | 4:40.71 |
| 3 | 45 | Louis Hines | 97 | S14 | Watford SC | 4:33.60 |
| 4 | 51 | Kahoru Harazawa | 97 | S10 | Beckenham | 4:20.40 |
| 5 | 48 | Jonathan Eke | 96 | S10 | Co Newport | 4:26.85 |
| 6 | 42 | Craig McNeil | 97 | S10 | SwimTrafford | 4:35.48 |
| 7 | 36 | Jonathan Fox | 91 | S7 | Co Manch Aq | 4:55.32 |
| 8 | 30 | Jacob Leach | 00 | S8 | Cockermouth | 5:01.63 |
| 9 | 24 | Adam Karas | 01 | S9 | Germany | 5:27.10 |