Now British Transport Police (BTP) has released an image of a man officers would like to speak to in connection with the incident.
A BTP spokesperson said the assault happened just after midnight on Saturday, March 29, when a 15-year-old girl was walking alone through the underpass at the station.
They said a man approached her and spoke to her, before sexually assaulting her.
The spokesperson added: “Officers believe the man in the image may have information that could help their investigation.”
Anyone who recognises the man pictured, or has any other information, is asked to contact British Transport Police by texting 61016 or by calling 0800 40 50 40, quoting reference 2500037655.
Alternatively, you can call Crimestoppers anonymously on 0800 555 111.
