Police have released a photo of a man they want to speak to after the disappearance of a 17-year-old girl from Aylesbury over a week ago.

Iris, 17, has been missing from the Buckinghamshire town since Friday, May 3.

Thames Valley Police has now issued an appeal for information about a man pictured with the teenager in Oxford on Saturday, May 4.

Iris has been described as around 5 ft 8 ins tall and of slim build. In the CCTV shot, she is seen wearing a black and red jacket, black jeans and a black cap.

Superintendent Matthew Bullivant said the force is “extremely concerned” for her welfare.

He added: “Iris was seen with a man in Oxford city centre on 4 May so we are keen to speak to him as he may have vital information about her whereabouts.

“I would like to emphasise, he is not a suspect of any offence, he is simply the last known person to speak to Iris, so we need to speak to him as soon as possible.”

The 17-year-old is believed to have boarded a train heading for Birmingham at Oxford railway station.

She also has links to Swindon, Hemel Hempstead, Watford, Wales, Liverpool and Manchester.

Iris’ mother said: “Iris you’re not in trouble. We want you home. We love you and we miss you.”

SI Bullivant said: “Anyone who sees Iris should call 999 immediately. Anyone with information that can help us find her, or the man pictured, or the man himself should report it on our website, quoting reference number 43240206731.

“Iris, if you see this, please get in touch with police or visit a police station so we can confirm you are safe. You are not in any trouble, we and your family are just concerned about you.”