Operator: West Midlands Trains
Previous Calling Points:
| 03:30 | Milton Keynes Central | Unknown |
| 03:34 | Bletchley | Unknown |
| 03:44 | Leighton Buzzard | Unknown |
| 03:53 | Tring | Unknown |
| 03:58 | Berkhamsted | Unknown |
| 04:03 | Hemel Hempstead | Unknown |