Fintan, from Reading, was last seen in Whitehouse Road in Oxford at around 3.31am on Wednesday (November 27) .

He is described as white, around 5ft 6ins tall with blond hair.

He was last seen wearing a blue jacket, and long white socks and trainers.

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Investigating officer Detective Sergeant Matthew Gorman said: “We are releasing new images of Fintan and ask anyone who may have seen him to get in touch.

(Image: TVP)

“We are becoming increasingly concerned for Fintan’s welfare, and would ask anyone with information on where he may be to share this with us.

“If you see him, please call 999.”

Alternatively, anyone who has any other relevant information can call the police on 101 or leave your information via the police website, quoting reference 43240573373.