Engineering work is taking place between Harpenden and Luton, closing various lines over the course of the weekend.
Throughout the day on Saturday, buses will replace trains between Harpenden and Bedford.
On Sunday, trains before 09:30 will be replaced by buses between Harpenden and Luton.
After 09:30 on Sunday, trains between Luton and Sutton will be amended to run between St Albans and Sutton.
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.
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.