An investigation into the four deaths is under way

The rail workers died in February after they were hit by a flatbed trailer which rolled down a slope at Tebay.

British Transport Police said a 42-year-old man from Chorley has been released from bail and no further action will be taken against him.

A 42-year-old man from Anglesey and a 27-year-old man from Maidstone have had their bail extended to September.

'File submitted'

A British Transport Police spokeswoman said: "The police inquiry into the deaths of four railway workers has been concluded.

"A file has been submitted to the Crown Prosecution Service in respect of two of the three men arrested."

The men who died were Chris Waters, 53, of Morecambe, Lancashire, Colin Buckley, 49, of Carnforth, Lancashire, Darren Burgess, 30, of Carnforth, and Gary Tindall, 46, of Tebay.

They were working on maintenance for the West Coast main line near Tebay when the wagon came loose at a yard.

A Health and Safety Executive investigation into the incident found the trailer's brakes were "not functional".