These dramatic photographs of a landslip close to Leighton Buzzard station shows why some rail services have been cancelled by both London Midland and Southern.
London Midland has axed a number of trains between Milton Keynes and Euston, while Southern did the same between Watford and Milton Keynes. Services are expected to remain disrupted until 6am on Friday.
The embankment slip took place on Saturday and engineers have been working since then to carry out urgent repairs.
Network Rail says 2,200 tonnes of material need to be replaced and made safe.
A London Midland spokesman told this website today that its Milton Keynes to London Euston service had been cancelled because one of the railway lines had been closed.
However, the spokesman said services between Birmingham and London Euston were still running, and still making stops at Leighton Buzzard and Milton Keynes.
A Network Rail spokesman said: “We are carrying out urgent repairs at Leighton Buzzard to ensure the ongoing safety of the railway.
“We advise train customers who travel on this stretch to check for the very latest information on National Rail Enquiries, nationalrail.co.uk, and on southernrailway.com and journeycheck.com/londonmidland.”