CCTV images of a man being sought in connection with the incident at Glasgow Central Station were released by British Transport Police (BTP) today.
It is the latest of a series of such assaults on staff during the Covid pandemic and at least the fifth spitting attack over the last year, most of them in Glasgow.
ScotRail staff usually carry “spit kits” to collect saliva samples which can be used to trace suspects using DNA tests.
BTP said the incident happened at 1.30pm on Saturday November 14 last year.
A spokesperson said: “A man was challenged at the station’s ticket barriers by a member of rail staff for attempting to travel on a child’s ticket.
“The man was refused travel for having an invalid ticket before he spat in the face of the member of rail staff and ran out of the station.
“Officers believe the man in the CCTV images may have information which could help their investigation.”
BTP said anyone recognising the man should text the force on 61016 or call 0800 405040, quoting reference 2000085354.
It said they could also call Crimestoppers on 0800 555 111.
The day after the incident, BTP said a ScotRail driver was reported to have been spat on by a male who was part of a group of people at Inverkeithing Station in Fife.
The incident was one of a series of reports of anti-social behaviour on the Fife Circle line that weekend which prompted BTP to increase patrols.