| Event | Meeting | Venue | Date | George Seery | Harry Barton | Bradley Francis | Pyers Lockwood | Alex O'Callaghan-Brown | Jubril Adeniji | Adam Booth | William Doyle | Kester Welch | Tye Parker |
| 400H | Muller British Championships | Sportcity | 4 Sep 20 | | | | | | | | | 53.86 | 4h2 | | | 54.12 | 5h2 | | | | | | |
| 400H | London Hurdles & Middle Distance Open Meeting | Bromley | 22 May 21 | 53.43 | 2r1 | | | | | 56.53 | 5r1 | | | | | | | | | | | | |
| 400H | South of England U20/Senior Championships | Bedford | 12 Jun 21 | 56.71 | 2h1 | | | | | | | | | | | 54.28 | 1h1 | | | | | | |
| 400H | South of England U20/Senior Championships | Bedford | 12 Jun 21 | | | | | | | 57.06 | 1h2 | | | 61.83 | 4h2 | | | | | | | | |
| 400H | South of England U20/Senior Championships | Bedford | 13 Jun 21 | 53.88 | 2 | | | | | 56.44 | 5 | | | | | 51.98 | 1 | | | | | | |
| 400H | England U20 & U23 Championships | Bedford | 19 Jun 21 | 53.94 | 2 | | | | | 57.13 | 7 | | | | | 51.47 | 1 | | | 56.25 | 6 | | |
| 400H | England U20 & U23 Championships | Bedford | 19 Jun 21 | 55.35 | 1h1 | | | | | 57.14 | 5h1 | | | | | | | | | 56.15 | 3h1 | | |
| 400H | ESAA - New Balance English Schools Championships | Sportcity | 9 Jul 21 | 53.14 | 1r1 | | | | | 57.22 | 5r1 | | | | | | | | | 55.53 | 4r1 | | |
| 400H | BUCS Outdoor Athletics Championship | Chelmsford | 2 May 22 | 53.73 | 7 | | | | | | | | | | | 52.72 | 3 | | | | | | |
| 400H | South of England U20/Senior & U15/U17 3000 Metres Championships | Chelmsford | 19 Jun 22 | 53.17 | 2 | | | | | | | | | | | | | | | 57.71 | 7 | | |
| 400H | Muller UK Athletics Championships | Sportcity | 24 Jun 22 | 52.88 | 4h1 | | | | | | | | | | | 54.68 | 7h1 | | | | | | |
| 400H | England Athletics U20 & U23 Championships incorporating World Junior Trials | Bedford | 16 Jul 22 | 54.12 | 2h2 | | | | | | | | | | | | | | | 56.69 | 4h2 | | |
| 400H | Nuneaton Season Opener | Nuneaton | 2 Apr 23 | | | | | | | 55.05 | 2 | 55.05 | 1 | | | | | | | | | | |
| 400H | Loughborough Open inc. BUCS 10000m | Loughborough | 22 Apr 23 | 51.82 | 1 | | | | | 56.35 | 4 | | | | | | | | | | | | |
| 400H | BUCS Outdoor Athletics Championships | Sportcity | 29 Apr 23 | | | | | | | 54.34 | 1h1 | | | | | 54.40 | 2h1 | | | | | | |
| 400H | BUCS Outdoor Athletics Championships | Sportcity | 29 Apr 23 | 52.71 | 1h3 | | | | | | | | | 56.06 | 3h3 | | | | | | | | |
| 400H | BUCS Outdoor Athletics Championships | Sportcity | 1 May 23 | 51.35 | 1 | | | | | 53.88 | 3 | 53.18 | 2 | 55.12 | 4 | DNS | - | | | | | | |
| 400H | England Athletics U20/U23 Open Championships | Chelmsford | 18 Jun 23 | 51.15 | 1 | 51.96 | 2 | | | 53.14 | 3 | | | 55.12 | 4 | | | | | 55.50 | 5 | | |
| 400H | UK Athletics Championships Manchester | Sportcity | 8 Jul 23 | | | 53.33 | 4h2 | | | 54.76 | 6h2 | | | | | | | | | | | | |
| 400H | Microplus UK Athletics Championships | Sportcity | 29 Jun 24 | 52.22 | 4h1 | | | 52.85 | 5h1 | 54.93 | 8h1 | | | | | | | | | | | | |
| 400H | National Athletics League - Premiership Match 2 | Woodford | 7 Jul 24 | 52.58 | 4r1 | | | 51.79 | 2r1 | | | | | | | | | | | | | | |
| 400H | England Athletics U20 & Senior Championships (inc.U23), Senior Para Championships (U20+) inc. CAU Championships | Birmingham | 20 Jul 24 | 51.33 | 2h1 | | | | | | | | | | | | | | | 55.47 | 4h1 | | |
| 400H | England Athletics U20 & Senior Championships (inc.U23), Senior Para Championships (U20+) inc. CAU Championships | Birmingham | 20 Jul 24 | | | | | 53.86 | 2h2 | 55.05 | 4h2 | | | 55.38 | 6h2 | | | | | | | | |
| 400H | England Athletics U20 & Senior Championships (inc.U23), Senior Para Championships (U20+) inc. CAU Championships | Birmingham | 21 Jul 24 | 51.87 | 1 | | | 52.09 | 4 | 54.57 | 6 | | | | | | | | | | | | |
| 400H | National Athletics League - Premiership | Birmingham | 3 Aug 24 | 52.35 | 4r1 | | | 52.15 | 3r1 | | | | | | | | | 59.51 | 7r1 | | | | |