Class 25 were used on one occasion that we know of.
 25249 at Trawsfynydd Nuclear Sidings, October 1985, picture by Minfford Ken |
| Locomotive Number | Build Date (Batch) | Location Built | Notes |
| 25027 | Dec 1977 | ||
| 25032 | 19/04/1982 | ||
| 25042 | Operated test train with DM45029 on 06/03/1985 | ||
| 25073 | |||
| 25154 | |||
| 25199 | Operated test train with DB999503 on 16/10/1985 | ||
| 25249 | |||
| 25255 | Operated a test train cosisting of RDB511023, RDB975000 and RDB787319 on 20/10/1976 | ||
| 25300 | |||