Nine rail workers were just seconds from death after being given no warning that an 80mph passenger train was bearing down on them, rail accident investigators have said.

The track workers, operating on a small bridge on the West Coast main line in Lancashire, were reliant on getting visual and audible warnings of approaching trains as their view was restricted by the curvature of the track.

But they received no advance warning that an Edinburgh to Manchester Airport train was approaching. The Rail Accident Investigation Branch (RAIB) said: "They were forced to take immediate evasive action when the train first became visible, approximately four seconds before it reached the site of work.

"Some staff were unable to reach a safe position and pressed themselves against the bridge parapet."

The RAIB has launched an investigation into the incident that happened south of Hest Bank between Carnforth and Lancaster on the afternoon of September 22 this year.