Engineering work is taking place between Amersham and Aylesbury, closing some lines.
As a result buses will replace trains between Aylesbury Vale Parkway and West Ruislip via Amersham.
You can use your tickets on London Underground services between Amersham and Baker Street.
Check before you travel:
These changes are not currently shown in the National Rail Enquiries Journey Planner, please check back nearer to the time of travel.
You can plan your journey on London Underground by using the Transport for London Journey Planner
Replacement Bus Travel Advice:
For helpful advice if you need to travel on a rail replacement service, including accessibility and bicycle information, please use this page.
You can find the location of your bus replacement by checking station signs or by searching for your station on our station information pages.