| Senior Ladies 400 Metres HEAT 1 (Motspur Park, 12 May) | 1 | | Linda Minnett | (Mitcham AC) | 58.6 | | | | | 2 | | Joanna Rout (U20) | (Feltham AC) | 59.1 | | | | | 3 | | M Ellingham | (Woking AC) | 62.2 | | | | | 4 | | K Piper | (Epsom & Ewell Harriers) | 63.0 | | | | | 5 | | R Gaussen | (Epsom & Ewell Harriers) | 63.7 | | | | | 6 | | Judith Hunt (U20) | (Bracknell AC) | 63.9 | | | | |
| | | Senior Ladies 400 Metres HEAT 2 (Motspur Park, 12 May) | 1 | | Dawn Lucy (U20) | (Mitcham AC) | 59.7 | | | | | 2 | | Michelle Cobden (U20) | (Selsonia Ladies AC) | 60.2 | | | | | 3 | | Ruth Messmer | (Croydon Harriers) | 61.3 | | | | | 4 | | Patricia Beauchamp (U23) | (Epsom & Ewell Harriers) | 63.5 | | | | | 5 | | J Neville | (Woking AC) | 65.1 | | | | | 6 | | S Howes | (Epsom & Ewell Harriers) | 67.4 | | | | |
|