Police are appealing for witnesses following an assault outside of the Secrets store in The Pavilions shopping centre on 29th December last year at 1:30pm.
During this dispute a young man picked up a walking stick and assaulted an older man with it, causing serious injury.
Police are particularly keen to speak to another man who intervened in the assault and took a photo of the young man.
Anyone with information is asked to call 101 or tweet @MetCC quoting reference 0900306/23.
Alternatively, information can be given anonymously through the independent charity Crimestoppers by calling 0800 555 111 or visiting www.crimestoppers-uk.org.