Oliver, 22, was last seen at about 8am this morning, Sunday 27 March.
Officers are concerned for his welfare and would like to locate him as quickly as possible.
Oliver is about 5ft 11ins tall and has a short beard.
He was last known to be wearing a dark grey Adidas tracksuit and blue Nike trainers.
If you see Oliver or know where he is, please call us immediately on 101.
Always dial 999 in an emergency.
