At just after 7.30pm on Wednesday, July 21, a man seated within the train’s carriage was seen to hit a child three to four times on the head.
When challenged by the train conductor, he said “I can do what I want, he’s my son.”
Officers believe the man in the image may have information which could help their investigation.
If you recognise him, or have any information, please contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 577 of 21/07/21.
Alternatively, you can call Crimestoppers on 0800 555 111.
