He is described as a male aged 16-18, with a tanned complexion and dark curly hair. He was wearing a grey and brown Gucci t-shirt and black shorts.
Detectives are keen to speak to anyone who may have witnessed the incident to help with their investigation.
Witnesses or anyone with information can contact BTP by texting 61016 or call 0800 40 50 40 quoting reference 625 of 24/07/21.
Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.
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