| Diamond League 2020 Stockholm | 400m (Women) | 52.42 | 4 | GBR | 2020-08-23 00:00:00 | FINAL | | PB |
| Gyulai István Memorial 2020 | 400m (Women) | 52.52 | 5 | GBR | 2020-08-19 00:00:00 | FINAL | | PB |
| Olympic Games 2024 Paris | 400m Hurdles (Women) 0.762m | 54.90 | 6 | GBR | 2024-08-06 00:00:00 | SF3 | | |
| Olympic Games 2024 Paris | 400m Hurdles (Women) 0.762m | 55.10 | 2 | GBR | 2024-08-05 00:00:00 | Repechage2 | | |
| Olympic Games 2024 Paris | 400m Hurdles (Women) 0.762m | 55.39 | 5 | GBR | 2024-08-04 00:00:00 | H3 | | |
| World Championship 2023 Budapest | 400m Hurdles (Women) 0.762m | 54.51 | 4 | GBR | 2023-08-22 00:00:00 | SF1 | | |
| World Championship 2023 Budapest | 400m Hurdles (Women) 0.762m | 54.27 | 1 | GBR | 2023-08-21 00:00:00 | H5 | | |
| World Championship 2022 Oregon | 400m Hurdles (Women) 0.762m | 55.39 | 7 | GBR | 2022-07-20 00:00:00 | SF2 | | |
| World Championship 2022 Oregon | 400m Hurdles (Women) 0.762m | 55.48 | 4 | GBR | 2022-07-19 00:00:00 | H3 | | |
| Diamond League 2022 Oslo | 400m Hurdles (Women) 0.762m | 54.84 | 3 | GBR | 2022-06-16 00:00:00 | FINAL | | |
| Diamond League 2022 Birmingham | 400m Hurdles (Women) 0.762m | 55.50 | 6 | GBR | 2022-05-21 00:00:00 | FINAL | | |
| Olympic Games 2020 Tokyo | 400m Hurdles (Women) 0.762m | DNF | | GBR | 2021-07-31 00:00:00 | H3 | | |
| Diamond League 2020 Rome | 400m Hurdles (Women) 0.762m | 55.58 | 6 | GBR | 2020-09-17 00:00:00 | FINAL | | |
| Ostrava Golden Spike 2020 | 300m Hurdles (W) 0.762m | 39.35 | 3 | GBR | 2020-09-08 00:00:00 | FINAL | | |
| World Indoor Championship 2022 Belgrade | 400m (Women) Indoor | 51.93 | 4 | GBR | 2022-03-18 00:00:00 | SF2 | | SB |
| World Indoor Championship 2022 Belgrade | 400m (Women) Indoor | 52.93 | 2 | GBR | 2022-03-18 00:00:00 | H3 | | |