| Location | Planned | Expected |
|---|---|---|
| London Marylebone | 23:57 | On time |
| Harrow-on-the-Hill | 00:09 | On time |
| Rickmansworth | 00:19 | |
| Chorleywood | 00:24 | |
| Chalfont & Latimer | 00:28 | |
| Amersham | 00:33 | |
| Great Missenden | 00:40 | |
| Wendover | 00:46 | |
| Stoke Mandeville | 00:50 | |
| Aylesbury | 00:55 | |
| Aylesbury Vale Parkway | 01:03 |