This image is being released in connection with an investigation by police into a sexual assault, that occurred on a Hull to Doncaster train.
This Update was shared by BTP.
A man boarded the train at Hull at 8.20 a.m on Thursday, August 22, and sat next to a woman, whom he later sexually assaulted.
Along with the woman he boarded the service with the man, who left the Doncaster service.
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The man in the picture, according to the officers might know something that could aid in their investigation.
If you have any information, please text 61016 or call 0800 40 50 40 and mention reference 148 of August 22 to BTP.
As an alternative, you can anonymously call Crimestoppers at 0800 555 111.
