Northbound - Platform 1
| Harrow & Wealdstone | 7:24 mins |
1
Platform 1
| Watford Junction | 13:30 mins |
| Watford Junction | 28:30 mins |
| Watford Junction | 43:30 mins |
| Watford Junction | 58:30 mins |
Southbound - Platform 2
| Elephant & Castle | 7:24 mins |
2
Platform 2
| London Euston | 3:30 mins |
| London Euston | 18:30 mins |
| London Euston | 33:30 mins |
| London Euston | 48:30 mins |