Two men have been charged with manslaughter after four rail workers died in an accident at Tebay in Cumbria earlier this year.
The two men are Mark Connolly, 42, the managing director of a rail contracting company called Mac Machinery, and Roy Kennet, 27, a former crane operator.
They have been bailed to appear before Kendal magistrates on 2 November.
The accident happened when a flatbed truck rolled down a slope, hitting four men working on the line.
Both men were charged with four counts of manslaughter when they answered police bail on Thursday.
In addition, Mr Connolly, from Anglesey, north Wales, faces three health and safety charges, and one of attempting to pervert the course of justice.
Mr Kennet, from Maidstone, Kent, also faces one health and safety charge.
The workers who died in Tebay were: Colin Buckley, 49, of Carnforth, Lancashire; Darren Burgess, 30, also of Carnforth; Chris Waters, 53, of Morecambe, Lancashire; and Gary Tindall, 46, of Tebay.