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| IAAF World Championships, 6/14 August, 2005, Helsinki, Finland | Representing |
| 13 Aug | Men | 4 X 400 Metres Relay | HEAT 3 | 1 | Martyn Rooney (Leg 2) | (Croydon Harriers) | 3:01.95 | | | Great Britain & Northern Ireland |
| 14 Aug | Men | 4 X 400 Metres Relay | FINAL | 4 | Martyn Rooney (Leg 2) | (Croydon Harriers) | 2:58.82 | | | Great Britain & Northern Ireland |
| 7 Aug | Women | 400 Metres | HEAT 1 | 4 | Donna Fraser | (Croydon Harriers) | 51.68 | | | Great Britain & Northern Ireland |
| 8 Aug | Women | 400 Metres | S-FINAL 1 | 7 | Donna Fraser | (Croydon Harriers) | 52.48 | | | Great Britain & Northern Ireland |
| 13 Aug | Women | 4 X 400 Metres Relay | HEAT 2 | 1 | Donna Fraser (Leg 2) | (Croydon Harriers) | 3:26.19 | | | Great Britain & Northern Ireland |
| 14 Aug | Women | 4 X 400 Metres Relay | FINAL | 3 | Donna Fraser (Leg 2) | (Croydon Harriers) | 3:24.44 | | | Great Britain & Northern Ireland |
