| Location | Planned | Expected |
|---|---|---|
| London Marylebone | 10:57 | 10:59 |
| Harrow-on-the-Hill | 11:09 | 11:11 |
| Rickmansworth | 11:19 | 11:22 |
| Chorleywood | 11:24 | 11:26 |
| Chalfont & Latimer | 11:28 | On time |
| Amersham | 11:32 | No report |
| Great Missenden | 11:40 | On time |
| Wendover | 11:46 | On time |
| Stoke Mandeville | 11:50 | On time |
| Aylesbury | 11:55 | On time |
| Aylesbury Vale Parkway | 12:03 | 12:00 |