Rail passengers across East Anglia face disruption in the run up to Christmas.
Engineering works will disrupt journeys in the run up to Christmas
Engineering works have started on the Bittern Line in Norfolk with buses replacing trains between North Walsham, Cromer and Sheringham until Christmas.
Work is planned for the line operated by One Railways between Norwich and London over the next two weekends.
On 17 December engineers will work on the Stansted Airport line through Hertfordshire and buses replace trains from Colchester to Harwich in Essex.
Thousands of passengers affected are being told to check amended timetables and replacement bus services with One Railways.