The incident happened at around 6.30pm on Wednesday the 3rd of January when two men prevented the victim from walking past them on the platform.
The victim tried to walk away and was threatened by one of the men, who then assaulted him with a weapon causing serious facial injuries.
Officers believe the men in the images may have information that could help their investigation.
Anyone with information is asked to contact BTP by texting 61016, or by calling 0800 40 50 40 quoting reference number 553 of the 3rd of January.
Alternatively, call Crimestoppers anonymously on 0800 555 111.