| Location | Planned | Expected |
|---|---|---|
| London Marylebone | 18:59 | |
| Harrow-on-the-Hill | 19:12 | |
| Rickmansworth | 19:25 | |
| Chorleywood | 19:30 | |
| Chalfont & Latimer | 19:34 | |
| Amersham | 19:38 | |
| Great Missenden | 19:45 | |
| Wendover | 19:51 | |
| Stoke Mandeville | 19:56 | |
| Aylesbury | 20:00 | |
| Aylesbury Vale Parkway | 20:08 |