Just before 10.30pm on Friday 9 September, a group were drinking alcohol on-board a service travelling between Westbury and Bradford-on-Avon. During the journey a train guard walked through the train and one of the men from the group verbally abused him.
When the service arrived at Bradford-on-Avon station, the same man threw a glass bottle at the train guard. Thankfully, it narrowly missed him and smashed on the side of the train.
Officers believe the man in the CCTV images may have information which could help the investigation.
If you recognise him, or have any information, please contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 2000070108.