Do you recognise this man? (Credit: British Transport Police)
The incident took place at around 5.55pm on Friday, 13 August.
Officers have released an image of a man they believe may have information that could help their investigation.
If you recognise him or have any other information please contact British Transport Police by calling 0800 40 50 40 quoting reference 422 of 14/08/21.
Alternatively, you can call Crimestoppers anonymously on 0800 555 111.
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