Police hope this man can help their probe into sickening scenes on a train when a passenger SPAT in a guard's face.
The victim's ordeal happened after he challenged a man over a ticket on board the train at Warrington Bank Quay.
As the passenger left the train at the Warrington station, he spat in the guard's face.
The stomach-churning incident happened at approximately 3.20pm on Tuesday, March 26.
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Now British Transport Police (BTP) have released a CCTV image of a man they believe "may have information which could help them investigate" the assault.
A BTP spokesman said: "A guard on board a Transport for Wales service was challenging a man following a ticket dispute.
"The man then left the train at Warrington Bank Quay, when leaving he spat in the face of the guard.
"Officers believe the man shown in this CCTV image may have information which could help them investigate."
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If you know the man pictured then contact BTP by sending a text to 61016 or by calling 0800 40 50 40 quoting reference 121 of 26/03/2019.
Or you can call Crimestoppers anonymously on 0800 555 111.
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