Delays to services from Milton Keynes Central are expected as emergency work continues to repair a landslide.
Exceptional rainfall brought by Storm Christoph is expected to have caused the landslide on the West Coast main line at Hillmorton Junction, just south of Rugby.
This is between the popular Milton Keynes - Birmingham route.
Network Rail's engineers have been monitoring ground movements since last Wednesday (27/1), and work has started to repair the line.
But currently, some lines are blocked, meaning that trains from Milton Keynes Central to Birmingham may either be delayed by up to 30 minutes or diverted via Northampton.
Ellen Wintle, Infrastructure Director for Network Rail’s West Coast South Route, said: “The sheer amount of rain we’ve had recently has caused the ground to slip, so we’re working hard to stabilise the area and put our plan into action for the repairs.
"Because this landslip was spotted early we have controlled the damage which means repairs can be carried out whilst keeping services running on the other tracks and we can continue to provide a safe and reliable railway for passengers and freight customers.
“I thank passengers making essential journeys during this period of national lockdown for their patience. I’d urge them to check National Rail Enquiries before setting off on their journey while we make sure passengers get the service they deserve on this absolutely vital part of railway between Milton Keynes and Birmingham.”
Disruption is expected to continue until at least Monday 15 February.
