| Planned | Expected | |
|---|---|---|
| Maesteg | 15:13 | 15:18 |
| Maesteg (Ewenny Road) | 15:15 | 15:19 |
| Garth (Mid Glamorgan) | 15:18 | 15:22 |
| Tondu | 15:26 | 15:31 |
| Sarn | 15:29 | 15:34 |
| Wildmill | 15:33 | 15:37 |
| Bridgend | 15:37 | 15:41 |
| Pencoed | 15:42 | 15:47 |
| Llanharan | 15:47 | 15:52 |
| Pontyclun | 15:51 | 15:57 |
| Cardiff Central | 16:08 | 16:11 |
| Newport (South Wales) | 16:23 | 16:25 |
| Severn Tunnel Junction | 16:34 | 16:43 |
| Caldicot | 16:36 | 16:47 |
| Chepstow | 16:45 | 16:59 |
| Lydney | 16:53 | 17:08 |
| Gloucester | 17:15 | 17:29 |
| Cheltenham Spa | 17:24 | 17:40 |