Engineering work is taking place between Bristol Temple Meads and Westbury, resulting in the closure of some lines.
The 04:54 Westbury to London Paddington service will now start from Newbury.
Customers from Newbury should travel using later services as no connection will be provided.
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.