The incident involved an empty goods train

The East Coast Mainline was blocked for several days when two empty EWS wagons came off at King Edward Bridge, near Newcastle, last May.

A Rail Accident Investigation Branch (RAIB) report found the immediate cause to be a combination of a minor track defect and a distorted wagon frame.

The RAIB recommended a number of changes to avoid repeat incidents.

These included amending the design and maintenance of the track and procedures to detect defective wagons on the network.

Nobody was hurt in the incident, which involved an empty goods train returning from the Drax Power station in North Yorkshire.