Engineering work is taking place between Harrow-on-the-Hill and Amersham, closing all lines.
No trains will run between London Marylebone and Aylesbury Vale Parkway all weekend.
Replacement bus services will run between Beaconsfield and Aylesbury Vale Parkway via Amersham.
Check before you travel:
You can plan your journey using the National Rail Enquiries 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 our Rail Replacement Services page.
You can find the pick-up and set-down location of rail replacement services by checking station signage or by searching for your station on our Find a Station page.
Please be advised that replacement vehicles may be busier than usual, and you should allow extra time for your journey.