British Transport Police said last week that they had received a complaint about the incident and confirmed on Wednesday that Mr Pollock, who has been dubbed "The Big Man", had been charged with assault.
Mr Main has not been charged, but both men have been reported to the procurator fiscal.
A spokesman said: "British Transport Police can now confirm that a 35-year-old man from Stirling and a 19-year-old man from Falkirk are the subject of a report to the local procurator fiscal in connection with an incident on board the 9.33pm Edinburgh Waverley to Perth service, at Linlithgow on Friday December 9 2011."
A Crown Office spokesman said: "The procurator fiscal at Livingston has received reports concerning two males in connection with an incident in Linlithgow on Friday December 9 2011.
"The reports remain under consideration by the procurator fiscal."
From...
http://news.stv.tv/