The teenage victim was left with bruising to the eye and the side of his face after taking several punches and kicks from the group of attackers.
As well as kicking and punching him, members of the group attempted to steal his bag.
British Transport Police are investigating the incident and have released CCTV images of eight individuals who they believe may have information which could help their investigation.
Anyone with information is requested to contact British Transport Police on 0800 40 50 40 or text 61016 quoting reference 714 of 16/02/18.
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