Commuters have faced further travel delays after a landslide blocked a railway between Coventry and Rugby.
Earth fell on to the tracks on Sunday afternoon causing cancellations and diversions to services between Birmingham and London Euston.
On Tuesday, West Midlands Railway and London Northwestern Railway both announced that no services were operating between Coventry and Northampton.
Disruption is expected to last all day.
Tens of thousands of train passengers are thought to have been affected.
Those travelling on Avanti West Coast trains have been advised that a limited number of services may be able to use the line between Rugby and Coventry in the northbound direction only.
Services from Birmingham New Street to Northampton will only run between Birmingham and Coventry, the operator adds.
A replacement bus service is running every 30 minutes between Coventry, Rugby, Long Buckby and Northampton.
The operators have issued apologies to customers.
Meanwhile, Network Rail said engineers were working to cut back and clear vegetation from the railway embankment so workers could understand the scale of the damage and check there was no risk of further landslips.
It recommended passengers consulted National Rail Enquiries before setting out.
Phil Barnes, operations director for Network Rail, said: "A plan is now in place to remove soil before checking the track to allow services to run.
"Our team is working around the clock to get trains running again as soon as we can, and we are sorry for the disruption to journeys this is causing."