| Location | Planned | Expected |
|---|---|---|
| London Marylebone | 11:57 | On time |
| Harrow-on-the-Hill | 12:09 | |
| Rickmansworth | 12:19 | |
| Chorleywood | 12:24 | |
| Chalfont & Latimer | 12:28 | |
| Amersham | 12:32 | |
| Great Missenden | 12:40 | |
| Wendover | 12:46 | |
| Stoke Mandeville | 12:50 | |
| Aylesbury | 12:55 | |
| Aylesbury Vale Parkway | 13:03 |