Engineering work is taking place between Worcestershire Parkway and Worcester Foregate Street, closing some lines.
The 06:43 Worcester Shrub Hill to London Paddington will start from Oxford. Customers from stations beyond Oxford to travel by earlier or later services.
The 07:00 Worcester Shrub Hill to Didcot Parkway will call additionally at Worcestershire Parkway.
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner