| Location | Planned | Expected |
|---|---|---|
| London Marylebone | 18:59 | 19:17 |
| Harrow-on-the-Hill | 19:12 | 19:29 |
| Rickmansworth | 19:23 | No report |
| Chorleywood | 19:27 | No report |
| Chalfont & Latimer | 19:31 | No report |
| Amersham | 19:36 | 19:55 |
| Great Missenden | 19:43 | 20:00 |
| Wendover | 19:50 | 20:05 |
| Stoke Mandeville | 19:55 | |
| Aylesbury | 20:00 | |
| Aylesbury Vale Parkway | 20:08 |